{ "apiVersion": 1, "kind": "work-order", "purpose": "Taking the firearm apart for a job such as refinishing, and putting it back together to specification.", "firearm": { "slug": "henry-big-boy", "name": "Henry Big Boy", "manufacturer": { "id": "henry", "name": "Henry Repeating Arms" }, "category": "rifle", "action": "lever-action", "calibers": [ ".357 Magnum", ".44 Magnum", ".45 Colt", ".38 Special" ], "alsoKnownAs": [ "Big Boy Steel", "Big Boy X Model" ], "coversAlso": [ "Big Boy Steel", "Big Boy Classic" ], "page": "firearms/henry-big-boy.html", "bundle": "api/v1/firearms/henry-big-boy.json", "lastUpdated": "2026-10-29" }, "notices": [ "Henry Repeating Arms publishes no owner disassembly for this firearm. The procedures below are not the manufacturer's, and doing them may void a warranty or service agreement.", "This work order is written for the Henry Big Boy. It is reported to cover Big Boy Steel; Big Boy Classic — if the firearm on the bench is one of those, check the torque notes: values do not always carry over.", "No manufacturer torque values are recorded. The values listed are reported by other sources, not the manufacturer — confirm them before use." ], "disclaimer": { "headline": "Read this before you use anything here.", "points": [ "This is a guide, not an authority. Entries are compiled from manufacturer manuals, technical manuals, published references, and community knowledge. Some of it comes from sources that are not authoritative, and some of it may simply be wrong.", "Always consult the manufacturer's manual for your specific firearm and serial-number range. Manufacturers change designs mid-production without renaming the model. The manual that shipped with your firearm outranks anything on this site.", "Consult a licensed gunsmith for anything beyond routine field stripping and cleaning, for any firearm you are unsure about, and for any procedure marked as gunsmith-recommended here.", "Treat every firearm as loaded. Verify it is unloaded, with the magazine removed and the chamber physically and visually checked, before any procedure in this database. Point it in a safe direction the entire time.", "Disassembly can damage a firearm or injure you. Springs are under tension, parts can launch, and reassembling a firearm incorrectly can make it unsafe to fire in a way that is not obvious from the outside. If a reassembled firearm does not pass a function check, stop and see a gunsmith.", "Torque values are shown in two groups. Values from the manufacturer or the issuing military are shown as such, with the document they came from. Values reported by anyone else — parts makers, gunsmithing publishers, articles, forums — are shown separately with who said them, how reliable that source is, and their exact words. Those are not specifications. Confirm any torque value with the manufacturer or a licensed gunsmith before relying on it.", "Nothing here is legal advice. Firearms law varies by country, state, and city, and some modifications or configurations are regulated or prohibited. You are responsible for knowing and following the law where you are.", "No warranty of any kind. Contributors and maintainers accept no liability for damage, injury, or loss arising from use of this material." ], "page": "disclaimer.html", "legal": { "summary": "Legal notice: this material is third-party information compiled from sources of varying reliability and is provided for general informational and educational purposes only. It is not gunsmithing, technical, safety or legal advice, it is not verified or endorsed by any manufacturer, and it must not be taken as fact. Any work on a firearm beyond the routine field stripping described in its own owner's manual should be performed only by a licensed and insured gunsmith. You use this material entirely at your own risk. Fundamental Build LLC and the project's contributors make no warranty of any kind and accept no liability for death, injury, damage or loss arising from its use. Full terms: LEGAL.md.", "page": "legal.html", "notice": "https://github.com/Fundamental-build-LLC/Pew-Takedown/blob/main/LEGAL.md" } }, "sourcing": { "confidence": "high", "verification": "manufacturer-manual-verified" }, "manufacturerDisassembly": { "status": "none", "limit": null, "statement": "Henry's Big Boy manual documents cleaning only, with the action closed up. It gives no disassembly procedure at all — not even the receiver-cover removal Henry describes for its rimfire rifles, since the Big Boy's receiver has no removable cover — and sends anything further to a gunsmith.", "source": { "title": "Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf", "page": "10", "pdfPage": 10, "pageUrl": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf#page=10", "quote": "Your firearm is a specialized, finely fitted mechanism. You may permanently damage it by attempting to disassemble the inner mechanisms. If further disassembly for service or cleaning is required, take your firearm to a qualified gunsmith." } }, "recalls": [], "shopTier": { "tier": 3, "group": "rifle", "rating": "Pew-Takedown editorial rating (1 easy – 3 hardest), not the manufacturer's", "reason": "66 parts, with a trigger/hammer linkage of rocker, sear rocker spring, trigger lock and spring, transfer bar and link, plus a carrier dog, carrier dog spring and lever plunger. Henry says nothing past cleaning should be taken apart and sends further disassembly to a gunsmith. It is a lever action with a linked transfer-bar trigger, so it sits with the Marlins at the hard end of the rifle group, on thin outside evidence.", "confidence": "low", "partCount": { "value": 66, "kind": "line-items", "covers": "Big Boy (H006, brass/silver receiver) list; H012 Steel list omitted", "basis": "manufacturer-parts-list", "source": { "title": "Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf", "page": "13", "pdfPage": 13, "pageUrl": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf#page=13", "quote": "65O O-ring" } }, "painPoints": [ { "issue": "Henry says the rifle is not to be taken apart past the manual and that further disassembly belongs to a gunsmith.", "during": "both", "source": { "title": "Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Your firearm is a specialized, finely fitted mechanism. You may permanently damage it by attempting to disassemble the inner mechanisms." } }, { "issue": "The trigger group is a linkage of rocker, trigger lock, sear rocker spring, transfer bar and link that has to be reassembled under spring load to work as a transfer-bar safety.", "during": "reassembly", "source": { "title": "Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Sear Rocker Spring" } }, { "issue": "The carrier is driven by a sprung carrier dog on a pin, and the lever by a plunger and spring, both of which have to be held while their pins go in.", "during": "reassembly", "source": { "title": "Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Lever Plunger Spring" } } ], "minutes": { "strip": 50, "rebuild": 80, "basis": "estimated", "note": "Estimate, set like the Marlins: lever and plunger, bolt (front/rear firing pins, extractor), carrier and dog, ejector, hammer/mainspring yoke, trigger guard plate with rocker, trigger lock, transfer bar and link, magazine tube, buttstock, forearm, sights. Rebuild longer for the trigger linkage springs and carrier dog.", "source": null }, "stripScope": [ { "assembly": "Action", "removes": [ "lever, lever plunger, spring and pin", "bolt (front and rear firing pins, firing pin spring, retention pins, extractor and spring/plunger)", "carrier, carrier dog, pin and spring, carrier screw", "ejector and spring", "locking bolt and spring" ], "tools": [ "pin punches" ] }, { "assembly": "Trigger guard plate", "removes": [ "hammer, hammer screw, mainspring yoke and main spring", "trigger, sear, rocker, trigger rocker link", "trigger lock and spring, sear rocker spring, sear trigger pin", "transfer bar and pin" ], "tools": [ "pin punches" ] }, { "assembly": "Furniture", "removes": [ "inner/outer magazine tube, follower, spring, knob", "buttstock, buttplate", "forearm", "sights" ], "tools": [ "brass drift for dovetail sights" ] } ], "hardware": { "pins": 10, "springs": 9, "detents": 5, "basis": "counted from the manufacturer's parts list (one per key number unless a quantity is given)" }, "specialTools": [ { "tool": "Gunsmith screwdrivers", "usedFor": "Lever, hammer, carrier, trigger guard plate and outer magazine screws (brass receiver mars easily)" }, { "tool": "Pin punches", "usedFor": "Sear trigger, transfer bar, carrier dog and lever plunger pins" }, { "tool": "Brass/nylon drift", "usedFor": "Dovetail sights" } ], "fitOnRebuild": [ { "check": "Transfer bar function", "why": "The hammer must not reach the firing pin unless the trigger is held back; check after reassembly", "source": null }, { "check": "Lever/carrier timing through the stroke", "why": "Carrier dog and lever plunger must lift and release the carrier cleanly", "source": null }, { "check": "Sight re-zero", "why": "Dovetail sights moved", "source": null } ], "assessed": "2026-10-29" }, "videos": [ { "title": "Big Boy .44 Loading", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57628134", "shows": [ "clear-and-make-safe", "operation" ], "appliesTo": "Henry H006 Big Boy .44 Magnum (brass receiver, tube-loading)", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" }, { "title": "Big Boy .44 Disassembly", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57625196", "shows": [ "field-strip" ], "appliesTo": "Henry H006 Big Boy .44 Magnum", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" }, { "title": "Big Boy .44 Reassembly", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57625199", "shows": [ "reassembly" ], "appliesTo": "Henry H006 Big Boy .44 Magnum", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" }, { "title": "Big Boy .44 Cleaning and Lubrication", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57625197", "shows": [ "cleaning", "maintenance" ], "appliesTo": "Henry H006 Big Boy .44 Magnum", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" }, { "title": "Big Boy .44 Safety", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57625205", "shows": [ "operation" ], "appliesTo": "Henry H006 Big Boy .44 Magnum", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" }, { "title": "How to Adjust Semi-Buckhorn Sights", "url": "https://www.youtube.com/watch?v=J6kY_nG3jLw", "platform": "youtube", "embedUrl": null, "shows": [ "adjustment" ], "appliesTo": "Henry rifles with semi-buckhorn rear sights (\"found on the vast majority of our rifles\" per the description)", "published": "2016-07-19", "note": null, "channel": { "id": "UC8EGtlQBzjZubrqKTO2_xDA", "name": "Henry Repeating Arms", "url": "https://www.youtube.com/@HenryUSA", "owner": "Henry Repeating Arms (Henry RAC Holding Corp.)" }, "accessed": "2026-10-15" } ], "configurations": [], "tools": [ { "name": "Pull-through bore cleaning kit", "required": true, "usedFor": "Cleaning the bore from breech to muzzle, as Henry directs." } ], "phases": [ { "id": "clear", "title": "Clear and make safe", "steps": [ { "n": 1, "instruction": "Point the muzzle in a safe direction and keep your finger off the trigger." }, { "n": 2, "instruction": "Twist and withdraw the inner magazine tube from the front of the outer tube under the barrel.", "warning": "The magazine spring is compressed inside. Withdraw it under control.", "partsFreed": [ "Inner magazine tube" ] }, { "n": 3, "instruction": "Tip the rifle muzzle-down so any remaining cartridges roll out of the outer tube, and count them out.", "partsFreed": [ "Cartridges from the magazine tube" ] }, { "n": 4, "instruction": "Work the lever fully open and closed repeatedly, catching each cartridge, until nothing more feeds." }, { "n": 5, "instruction": "With the lever open, inspect the chamber, the carrier, and the magazine tube with a light.", "warning": "Three places: chamber, carrier, and tube." }, { "n": 6, "instruction": "Physically confirm the chamber is empty and remove all live ammunition from the work area." } ], "videos": [ { "title": "Big Boy .44 Loading", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57628134", "shows": [ "clear-and-make-safe", "operation" ], "appliesTo": "Henry H006 Big Boy .44 Magnum (brass receiver, tube-loading)", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" } ] }, { "id": "disassemble", "title": "Disassemble", "videos": [ { "title": "Big Boy .44 Disassembly", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57625196", "shows": [ "field-strip" ], "appliesTo": "Henry H006 Big Boy .44 Magnum", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" } ], "procedures": [ { "procedure": "field-strip", "title": "Field Strip — Lever and Bolt Removal", "level": "field-strip", "configuration": false, "steps": [ { "n": 1, "instruction": "Complete the Clear and Make Safe procedure. Make sure the hammer is in the fired-down position — the safety only functions as designed with the hammer down — and keep all ammunition out of the cleaning area.", "warning": "The manual is explicit that the hammer must be down before cleaning. Never test the mechanical function of the rifle with live ammunition." }, { "n": 2, "instruction": "Open the action by cycling the lever forward and inspect the chamber and bore for brass, copper, and powder fouling." }, { "n": 3, "instruction": "Clean the bore in the direction of bullet travel — breech to muzzle — using a pull-through kit.", "tip": "Cleaning muzzle to breech drags powder residue out of the bore and into the chamber and action, which is how a rifle ends up needing a gunsmith to clean it properly. A rod and patches work if you are careful with the muzzle crown." }, { "n": 4, "instruction": "Use a clean patch each pass. Never reverse a brush inside the barrel, and never run a brush down the barrel first.", "tip": "Reversing a brush bends the bristles like bending a wire until it snaps. A brush sent down first picks up dirt and moisture and deposits them in the chamber and receiver." }, { "n": 5, "instruction": "Use only a few drops of solvent or oil — no more than the patch will absorb.", "tip": "Excess solvent drips into the trigger mechanism and makes it gummy; excess oil drains back into the stock and can rot the wood." }, { "n": 6, "instruction": "Wipe the bolt clean of debris with solvent and a patch or small rag, then lightly oil it." }, { "n": 7, "instruction": "Coat all exposed metal with a film of oil. Do not leave fired cases in the chamber — moisture sweats out of them and causes rust." }, { "n": 8, "instruction": "Stop here. Henry states plainly that it is not necessary to take a Henry lever action apart to keep it clean, and that you may permanently damage it by disassembling the inner mechanisms.", "warning": "Do not take this rifle apart further than the manual explains. If further disassembly is required for service, take it to a qualified gunsmith." } ] } ] }, { "id": "refinish", "title": "Refinish", "components": [], "manufacturerPartsList": { "parts": 66, "scope": "Two separate lists: p.13 headed (H006) = brass/silver-receiver Big Boy, transcribed as the base model; p.14 headed (H012) = Big Boy Steel, omitted. Each series spans rifles, carbines and Mare's Leg pistols; no row is model-marked." }, "partsDiagrams": [], "materials": [ { "component": "Barrel", "material": "Steel", "finish": "Blued", "appliesTo": "H006G (Big Boy .44 Mag, brass receiver, 20in octagon)", "note": null, "source": { "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Barrel Type … Octagon Blued Steel" } }, { "component": "Receiver", "material": "Brass", "finish": "Polished Hardened Brass", "appliesTo": "H006G", "note": null, "source": { "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Receiver Finish … Polished Hardened Brass" } }, { "component": "Stock", "material": "American Walnut", "finish": null, "appliesTo": "H006G", "note": null, "source": { "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Stock Material … American Walnut" } }, { "component": "Buttplate/Pad", "material": "Brass", "finish": null, "appliesTo": "H006G", "note": null, "source": { "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Buttplate/Pad … Brass" } }, { "component": "Receiver", "material": "Steel", "finish": "Blued", "appliesTo": "H012G (Big Boy Steel) — https://www.henryusa.com/firearm/h12-classic-rifle-carbine/", "note": null, "source": { "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Receiver Finish … Blued Steel" } }, { "component": "Stock", "material": "American Walnut", "finish": null, "appliesTo": "H012G (Big Boy Steel)", "note": null, "source": { "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Stock Material … American Walnut" } } ], "note": "The components the procedures above separate. Coating, masking and cure are outside this database; follow your coating system's instructions. A part the manufacturer marks \"factory fit\" should not be swapped or reworked." }, { "id": "reassemble", "title": "Reassemble", "videos": [ { "title": "Big Boy .44 Reassembly", "url": "https://www.henryusa.com/own-a-henry/instructional-videos/firearm-guides/big-boy-h006/", "platform": "vimeo", "embedUrl": "https://player.vimeo.com/video/57625199", "shows": [ "reassembly" ], "appliesTo": "Henry H006 Big Boy .44 Magnum", "published": "2013-01-17", "note": null, "channel": { "id": "vimeo:henryrepeating", "name": "Henry Repeating Arms", "url": "https://vimeo.com/henryrepeating", "owner": "Henry Repeating Arms" }, "accessed": "2026-10-15" } ], "procedures": [ { "procedure": "reassembly", "title": "Reassembly", "configuration": false, "steps": [ { "n": 1, "instruction": "Confirm the bore and chamber are dry of excess solvent and that no patch or bristle is left in the action." }, { "n": 2, "instruction": "If the inner magazine tube was removed for loading or cleaning, seat it fully and lock it." }, { "n": 3, "instruction": "Cycle the lever through several full strokes and confirm smooth operation and full lockup." }, { "n": 4, "instruction": "Confirm the hammer comes to full cock at the end of the lever stroke and that the half-cock notch holds." }, { "n": 5, "instruction": "With the rifle empty, confirm the trigger does not release the hammer with the lever partly open." }, { "n": 6, "instruction": "Run a dry patch through the bore before shooting." } ], "instruction": null } ] }, { "id": "torque", "title": "Torque", "coverage": "reported-only", "manufacturer": [], "reported": [ { "fastener": "Forward handguard screws (6)", "appliesTo": "Midwest Industries Henry Handguard Sight System (MI-H4XRS .44/.45 or MI-H357XRS .357) on Henry Big Boy Steel / Big Boy X models (H012 series per MI chart; not brass receivers or octagon barrels)", "qualifier": "exact", "value": 20, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 2.3, "in-lb": 20, "ft-lb": 1.7 }, "valueMax": null }, "sequence": null, "threadlocker": null, "source": { "title": "Midwest Industries Henry Extended Handguard Sight System (MI-H5XRS / MI-H4XRS / MI-H357XRS / MI-H3030XRS) — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-Extended-Handguard-Sight-System-Instructions.pdf", "page": "PDF p. 1 (single page)", "pdfPage": 1, "pageUrl": "https://midwestindustriesinc.com/content/installation-instructions/Henry-Extended-Handguard-Sight-System-Instructions.pdf#page=1", "quote": "Tighten all 6 forward handguard screws to 20in/lbs." } }, { "fastener": "Top rail receiver screws", "appliesTo": "Midwest Industries Henry Handguard Sight System (MI-H4XRS / MI-H357XRS) on Henry Big Boy Steel / Big Boy X models (H012 series)", "qualifier": "exact", "value": 10, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 1.1, "in-lb": 10, "ft-lb": 0.83 }, "valueMax": null }, "sequence": null, "threadlocker": null, "source": { "title": "Midwest Industries Henry Extended Handguard Sight System (MI-H5XRS / MI-H4XRS / MI-H357XRS / MI-H3030XRS) — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-Extended-Handguard-Sight-System-Instructions.pdf", "page": "PDF p. 1 (single page)", "pdfPage": 1, "pageUrl": "https://midwestindustriesinc.com/content/installation-instructions/Henry-Extended-Handguard-Sight-System-Instructions.pdf#page=1", "quote": "Tighten receiver screws to 10in/lbs." } }, { "fastener": "Front hand guard tenon screws (2)", "appliesTo": "Midwest Industries Henry M-LOK Handguard G2 (MI-H44-45 or MI-H357) on Henry Big Boy Steel / Big Boy X models (H012 series per MI chart; not brass receivers)", "qualifier": "exact", "value": 20, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 2.3, "in-lb": 20, "ft-lb": 1.7 }, "valueMax": null }, "sequence": null, "threadlocker": null, "source": { "title": "Midwest Industries Henry M-LOK Handguard G2 (MI-H4570 / MI-H357 / MI-H44-45 / MI-H3030) — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-M-LOK-Handguard-G2-Instructions.pdf", "page": "PDF p. 1 (single page)", "pdfPage": 1, "pageUrl": "https://midwestindustriesinc.com/content/installation-instructions/Henry-M-LOK-Handguard-G2-Instructions.pdf#page=1", "quote": "Torque front two hand guard tenon screws to 20 inch/lbs." } }, { "fastener": "Ghost ring rail base, shorter front receiver screws", "appliesTo": "Midwest Industries Henry Pistol Dovetail Sight Ghost Ring Rail (MI-H4-GRR / MI-H4-GRT1) on Henry Big Boy Steel H012G/GM/GC/GML/GL/GMR/GCL/GMAW/GR/GCR/GAW/GCAW", "qualifier": "maximum", "value": 10, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 1.1, "in-lb": 10, "ft-lb": 0.83 }, "valueMax": null }, "sequence": null, "threadlocker": "Vibra-tite (provided)", "source": { "title": "Midwest Industries Henry H5/H4 Ghost Ring Rail — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-H5-H4-Ghost-Ring-Rail-Instructions.pdf", "page": "PDF p. 1 (single page)", "pdfPage": 1, "pageUrl": "https://midwestindustriesinc.com/content/installation-instructions/Henry-H5-H4-Ghost-Ring-Rail-Instructions.pdf#page=1", "quote": "Install the shorter front receiver screws with provided Vibra-tite. Torque to a max of 10inch pounds." } }, { "fastener": "Ghost ring rail base, shorter receiver screws", "appliesTo": "Midwest Industries Henry Pistol X Model Ghost Ring Rail (MI-HX4-GRR / MI-HX4-GRT1) on Henry Big Boy X Model H012CX/H012MX/H012X", "qualifier": "maximum", "value": 10, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 1.1, "in-lb": 10, "ft-lb": 0.83 }, "valueMax": null }, "sequence": null, "threadlocker": "Vibra-tite (provided)", "source": { "title": "Midwest Industries Henry X4 Ghost Ring Rail — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-X4-Ghost-Ring-Rail-Instructions.pdf", "page": "PDF p. 1 (single page)", "pdfPage": 1, "pageUrl": "https://midwestindustriesinc.com/content/installation-instructions/Henry-X4-Ghost-Ring-Rail-Instructions.pdf#page=1", "quote": "Install the shorter receiver screws with provided Vibra-tite. Torque to a max of 10inch pounds." } }, { "fastener": "Lever rail front pillar jack screw (in rear-sight dovetail)", "appliesTo": "XS Sights Lever Rail (with or without ghost ring set) on a Henry Big Boy steel-frame round-barrel carbine (.357/.44/.45 Colt; not brass or octagon)", "qualifier": "range", "value": 15, "valueMax": 18, "unit": "in-lb", "converted": { "value": { "N-m": 1.7, "in-lb": 15, "ft-lb": 1.2 }, "valueMax": { "N-m": 2, "in-lb": 18, "ft-lb": 1.5 } }, "sequence": "The maker says not to tighten beyond this range.", "threadlocker": null, "source": { "title": "XS Sights Lever Rail & Rear Sight Installation — Marlin 1895/336/1894, Henry, Rossi R95", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Lever%20Rail%20%26%20Rear%20Sight%20Installation%20-%20Marlin%201895-336-1894-Henry-Rossi%20R95%20compiled.pdf", "page": "PDF p. 2 of 6", "pdfPage": 2, "pageUrl": "https://xssights.com/content/Install%20Instructions/Lever%20Rail%20%26%20Rear%20Sight%20Installation%20-%20Marlin%201895-336-1894-Henry-Rossi%20R95%20compiled.pdf#page=2", "quote": "install the pillar jack screw into the pillar a tighten using a hex wrench. Do not tighten beyond 15-18 INCH pounds of torque." } }, { "fastener": "Lever rail attaching screws (rear sight screw, mid rail screws into receiver) and pillar nut", "appliesTo": "XS Sights Lever Rail (with or without ghost ring set) on a Henry Big Boy steel-frame round-barrel carbine (.357/.44/.45 Colt; not brass or octagon)", "qualifier": "range", "value": 15, "valueMax": 18, "unit": "in-lb", "converted": { "value": { "N-m": 1.7, "in-lb": 15, "ft-lb": 1.2 }, "valueMax": { "N-m": 2, "in-lb": 18, "ft-lb": 1.5 } }, "sequence": null, "threadlocker": "Blue thread locking compound", "source": { "title": "XS Sights Lever Rail & Rear Sight Installation — Marlin 1895/336/1894, Henry, Rossi R95", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Lever%20Rail%20%26%20Rear%20Sight%20Installation%20-%20Marlin%201895-336-1894-Henry-Rossi%20R95%20compiled.pdf", "page": "PDF p. 2 of 6", "pdfPage": 2, "pageUrl": "https://xssights.com/content/Install%20Instructions/Lever%20Rail%20%26%20Rear%20Sight%20Installation%20-%20Marlin%201895-336-1894-Henry-Rossi%20R95%20compiled.pdf#page=2", "quote": "If everything looks good fit wise, you can then torque screws and pillar nut to 15-18 INCH pounds." } }, { "fastener": "Lever rail pillar jack screw (5/64 hex)", "appliesTo": "XS Sights Henry Lever Rail (Henry Big Boy carbines .357/.44/.45 Colt and Big Boy X; steel frame, round barrel only)", "qualifier": "maximum", "value": 20, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 2.3, "in-lb": 20, "ft-lb": 1.7 }, "valueMax": null }, "sequence": null, "threadlocker": null, "source": { "title": "XS Sights Henry Lever Rail — Installation Insert (2021)", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf", "page": "PDF p. 1 of 2", "pdfPage": 1, "pageUrl": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf#page=1", "quote": "Install the Pillar Jack Screw and tighten with 5/64 wrench provided. Do not tighten this screw beyond 20 INCH-lbs (approx. a firm handshake), overtightening this screw can cause it to shear." } }, { "fastener": "Lever rail pillar nut", "appliesTo": "XS Sights Henry Lever Rail (Henry Big Boy carbines .357/.44/.45 Colt and Big Boy X)", "qualifier": "maximum", "value": 20, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 2.3, "in-lb": 20, "ft-lb": 1.7 }, "valueMax": null }, "sequence": null, "threadlocker": null, "source": { "title": "XS Sights Henry Lever Rail — Installation Insert (2021)", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf", "page": "PDF p. 1 of 2", "pdfPage": 1, "pageUrl": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf#page=1", "quote": "Install Pillar Nut on Jack Screw and tighten. Do not tighten beyond 20 INCH-lbs." } }, { "fastener": "Front sight ramp screw", "appliesTo": "XS Sights front sight ramp (Henry Lever Rail insert) on a Henry Big Boy carbine", "qualifier": "exact", "value": 15, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 1.7, "in-lb": 15, "ft-lb": 1.2 }, "valueMax": null }, "sequence": null, "threadlocker": "Blue threadlocking compound", "source": { "title": "XS Sights Henry Lever Rail — Installation Insert (2021)", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf", "page": "PDF p. 1 of 2", "pdfPage": 1, "pageUrl": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf#page=1", "quote": "Install front sight ramp and tighten screw torque spec 15 INCH-lbs." } }, { "fastener": "Handguard forearm support screws", "appliesTo": "XS Sights LVR-HG M-LOK handguard on Henry Big Boy carbines (.357 Mag, .44 Mag) — XS lists Henry .357 Mag, .44 Mag and .45-70", "qualifier": "exact", "value": 15, "valueMax": null, "unit": "in-lb", "converted": { "value": { "N-m": 1.7, "in-lb": 15, "ft-lb": 1.2 }, "valueMax": null }, "sequence": "One screw at a time.", "threadlocker": "Blue threadlocker", "source": { "title": "XS Sights LVR-HG Henry M-LOK Handguard — Installation (All Calibers)", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Henry%20Handguard%20Installation%20All%20Calibers.pdf", "page": "PDF p. 2 of 2", "pdfPage": 2, "pageUrl": "https://xssights.com/content/Install%20Instructions/Henry%20Handguard%20Installation%20All%20Calibers.pdf#page=2", "quote": "Remove one of the forearm support screws and add a dab of blue threadlocker to the screw and reinstall setting the screw to 15-inch pounds of torque and then repeat the same process with the other forearm support screw." } } ], "notes": "The manufacturer's documents give no torque value. They say: \"Loosen the screw to the right of the white diamond, raise or lower as needed to correct elevation, then re-tighten the screw.\" (Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols, PDF p. 9)" }, { "id": "function-check", "title": "Function check", "checks": [ "Verify the rifle is unloaded — chamber, carrier, and magazine tube — before each step.", "Cycle the lever fully and confirm the bolt locks up with the lever closed.", "With the hammer cocked, engage the safety if fitted and press the trigger. The hammer must not fall.", "Disengage the safety and press the trigger. The hammer should fall.", "Confirm the lever safety, where fitted, prevents firing with the lever not fully closed.", "Load dummy rounds through the magazine tube and cycle them, confirming they feed from the carrier and eject cleanly.", "Confirm the inner magazine tube latches securely." ], "videos": [] } ], "troubleshooting": [], "sources": [ { "n": 1, "id": "henry-h006-manual", "title": "Henry Big Boy — Instruction Manual for All H006 and H012 Series Rifles and Pistols", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/wp-content/uploads/2021/04/Henry-H006-Legacy-H012-Series-User-Manual.pdf", "accessed": "2026-09-27" }, { "n": 2, "id": "henryusa-specs-a843e6", "title": "H6 Big Boy Rifle & Carbine | Henry Repeating Arms — Specifications", "publisher": "Henry Repeating Arms", "reliability": "primary", "url": "https://www.henryusa.com/firearm/h6-big-boy-rifle-carbine/", "accessed": "2026-10-03" }, { "n": 3, "id": "midwest-industries-inc-912417", "title": "Midwest Industries Henry Extended Handguard Sight System (MI-H5XRS / MI-H4XRS / MI-H357XRS / MI-H3030XRS) — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-Extended-Handguard-Sight-System-Instructions.pdf", "accessed": "2026-10-11" }, { "n": 4, "id": "midwest-industries-inc-e6ae6c", "title": "Midwest Industries Henry M-LOK Handguard G2 (MI-H4570 / MI-H357 / MI-H44-45 / MI-H3030) — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-M-LOK-Handguard-G2-Instructions.pdf", "accessed": "2026-10-11" }, { "n": 5, "id": "midwest-industries-inc-3ea313", "title": "Midwest Industries Henry H5/H4 Ghost Ring Rail — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-H5-H4-Ghost-Ring-Rail-Instructions.pdf", "accessed": "2026-10-11" }, { "n": 6, "id": "midwest-industries-inc-43a826", "title": "Midwest Industries Henry X4 Ghost Ring Rail — Instructions", "publisher": "Midwest Industries, Inc.", "reliability": "secondary", "url": "https://midwestindustriesinc.com/content/installation-instructions/Henry-X4-Ghost-Ring-Rail-Instructions.pdf", "accessed": "2026-10-11" }, { "n": 7, "id": "xs-sights-36287d", "title": "XS Sights Lever Rail & Rear Sight Installation — Marlin 1895/336/1894, Henry, Rossi R95", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Lever%20Rail%20%26%20Rear%20Sight%20Installation%20-%20Marlin%201895-336-1894-Henry-Rossi%20R95%20compiled.pdf", "accessed": "2026-10-11" }, { "n": 8, "id": "xs-sights-272fb0", "title": "XS Sights Henry Lever Rail — Installation Insert (2021)", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Henry%20Lever%20Rail%20Insert%202021.pdf", "accessed": "2026-10-11" }, { "n": 9, "id": "xs-sights-c44646", "title": "XS Sights LVR-HG Henry M-LOK Handguard — Installation (All Calibers)", "publisher": "XS Sights", "reliability": "secondary", "url": "https://xssights.com/content/Install%20Instructions/Henry%20Handguard%20Installation%20All%20Calibers.pdf", "accessed": "2026-10-11" } ] }