{ "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": "kel-tec-sub-2000", "name": "Kel-Tec SUB-2000", "manufacturer": { "id": "kel-tec", "name": "Kel-Tec CNC Industries" }, "category": "pistol-caliber-carbine", "action": "blowback", "calibers": [ "9x19mm Parabellum", ".40 S&W" ], "alsoKnownAs": [ "SUB2000", "SUB-2000 Gen 2" ], "coversAlso": [ "SUB-2000 Gen 1 and Gen 2", "Various magazine well configurations" ], "page": "firearms/kel-tec-sub-2000.html", "bundle": "api/v1/firearms/kel-tec-sub-2000.json", "lastUpdated": "2026-10-29" }, "notices": [ "Kel-Tec CNC Industries safety notice — SUB-2000 Safety Recall (barrel heat treatment) (2018): A portion of SUB-2000 (SUB2000) rifles manufactured in 2017; affected serial numbers are verified with the lookup at recalls.keltecweapons.com. Enter the serial number at recalls.keltecweapons.com; if affected, return the rifle to Kel-Tec for barrel replacement. All costs of the recall are covered by Kel-Tec.", "This work order is written for the Kel-Tec SUB-2000. It is reported to cover SUB-2000 Gen 1 and Gen 2; Various magazine well configurations — if the firearm on the bench is one of those, check the torque notes: values do not always carry over." ], "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": "published", "limit": null, "statement": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": "15", "pdfPage": 16, "pageUrl": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf#page=16", "quote": null } }, "recalls": [ { "title": "SUB-2000 Safety Recall (barrel heat treatment)", "issued": "2018", "affected": "A portion of SUB-2000 (SUB2000) rifles manufactured in 2017; affected serial numbers are verified with the lookup at recalls.keltecweapons.com.", "hazard": "Improperly heat-treated steel tubes from a third-party supplier were used for some barrels; the barrel could rupture when a cartridge is fired, with risk of serious personal injury.", "action": "Enter the serial number at recalls.keltecweapons.com; if affected, return the rifle to Kel-Tec for barrel replacement. All costs of the recall are covered by Kel-Tec.", "status": "check-serial", "source": { "title": "KelTec — KelTec Recall Information: SUB2000 Safety Recall", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://www.keltecweapons.com/keltec-recall-information/", "page": null, "pdfPage": null, "pageUrl": null, "quote": "This recall only affects a portion of SUB2000s that were manufactured in 2017. All costs associated with the recall of your firearm shall be covered by KelTec." } } ], "shopTier": { "tier": 2, "group": "rifle", "rating": "Pew-Takedown editorial rating (1 easy – 3 hardest), not the manufacturer's", "reason": "76 line items (112 pieces) in a clamshell polymer grip/frame held by pins, with a buffer and stock pin under recoil-spring tension. Kel-Tec warns that dropping the hammer with the bolt out makes the rifle inoperable. The stock pin needs the buffer, stock position and receiver lined up at once. There are many parts and several traps, but no timing.", "confidence": "medium", "partCount": { "value": 76, "kind": "line-items", "covers": "SUB2000 exploded view and parts list (REV 013020), 9mm and .40 rows", "basis": "manufacturer-parts-list", "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": "26–27", "pdfPage": 27, "pageUrl": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf#page=27", "quote": "S017 M3 X16 SHS" } }, "painPoints": [ { "issue": "The buffer assembly is under recoil-spring tension and parts fly when the stock pin comes out; the pin is not captive.", "during": "disassembly", "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Keep positive contact with the buffer assembly while the stock pin is removed as parts may fly loose." } }, { "issue": "Dropping the hammer with the bolt assembly out makes the rifle inoperable.", "during": "both", "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Do not release the hammer with the bolt assembly removed. This will make the SUB2000 rifle inoperable." } }, { "issue": "The stock pin only goes back with the buffer slot, stock position and receiver all aligned at once against spring tension.", "during": "reassembly", "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Push the stock pin completely in, which may take some adjusting of the parts for complete alignment" } } ], "minutes": { "strip": 45, "rebuild": 75, "basis": "estimated", "note": "Estimate: field strip (stock pin, buffer, recoil spring, bolt, operating handle), split the grip/frame halves (receiver grip pins), trigger group (hammer, trigger, sear, safety, springs), trigger guard latch, mag catch, sights. Rebuild longer: clamshell alignment with the trigger parts in place, stock pin alignment.", "source": null }, "stripScope": [ { "assembly": "Receiver tube", "removes": [ "stock pin, buffer assembly, recoil spring", "bolt assembly (firing pin and spring, extractor and spring)", "operating handle", "front sight and detent pin/spring", "rear sight/windage detent and spring" ] }, { "assembly": "Grip / trigger housing (clamshell)", "removes": [ "receiver grip pins (long, short)", "hammer and hammer spring", "trigger, trigger bar pin, trigger spring", "sear and spring", "safety, pin and spring", "trigger guard, latch and springs", "mag catch and spring" ], "tools": [ "pin punches" ] } ], "hardware": { "pins": 12, "springs": 14, "detents": 4, "basis": "counted from the manufacturer's parts list (one per key number unless a quantity is given)" }, "specialTools": [ { "tool": "Pin punches", "usedFor": "Receiver grip pins, trigger bar pin" }, { "tool": "Front sight tool/screwdriver", "usedFor": "Front sight detent" } ], "fitOnRebuild": [ { "check": "Stock pin and buffer alignment", "why": "The pin carries the buffer/recoil load and must go fully home", "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "Push the stock pin completely in, which may take some adjusting of the parts for complete alignment" } }, { "check": "Cycle/function check", "why": "Cycle the bolt and check the hammer and safety after the grip halves go back", "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "cycle the bolt assembly a few times to check the action" } }, { "check": "Barrel collar", "why": "Leave the collar/barrel in place", "source": null } ], "assessed": "2026-10-29" }, "videos": [ { "title": "Kel-Tec SUB-2000 Field Strip", "url": "https://www.youtube.com/watch?v=tHBL40L23dM", "platform": "youtube", "embedUrl": null, "shows": [ "field-strip" ], "appliesTo": "SUB-2000 (Gen 2 era upload, Aug 2016)", "published": "2016-08-22", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" }, { "title": "SUB-2000 Assembly", "url": "https://www.youtube.com/watch?v=Pmd4HuPog74", "platform": "youtube", "embedUrl": null, "shows": [ "reassembly" ], "appliesTo": "SUB-2000 (Gen 2 era upload, Aug 2016)", "published": "2016-08-22", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" }, { "title": "KelTec SUB-2000 Hammer Reset", "url": "https://www.youtube.com/watch?v=2Mx-wN7l3DY", "platform": "youtube", "embedUrl": null, "shows": [ "reassembly", "maintenance" ], "appliesTo": "SUB-2000 (description: 'This will also work on the GEN1 SUB-2000')", "published": "2016-08-22", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" }, { "title": "SUB2000 Quick Start Guide", "url": "https://www.youtube.com/watch?v=stS7lNqg0QY", "platform": "youtube", "embedUrl": null, "shows": [ "operation" ], "appliesTo": "SUB2000 (Gen 2)", "published": "2022-10-26", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" } ], "configurations": [], "tools": [ { "name": "Cartridge or other pointed object", "required": true, "usedFor": "Pressing the stock pin out from either side.", "substitute": "Kel-Tec names a cartridge; any small punch works. Use an empty case, not a live round." } ], "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": "Place the weapon in the SAFE configuration using the push-bolt safety behind the trigger." }, { "n": 3, "instruction": "Remove the magazine." }, { "n": 4, "instruction": "Cycle the bolt assembly manually to eject any chambered cartridge." }, { "n": 5, "instruction": "Inspect the chamber and magazine well with a light and physically confirm the chamber is empty." }, { "n": 6, "instruction": "Confirm the carbine is unfolded, with the barrel assembly rotated to the chambering position, while you clear it." }, { "n": 7, "instruction": "Remove all live ammunition from the work area." } ], "videos": [] }, { "id": "disassemble", "title": "Disassemble", "videos": [ { "title": "Kel-Tec SUB-2000 Field Strip", "url": "https://www.youtube.com/watch?v=tHBL40L23dM", "platform": "youtube", "embedUrl": null, "shows": [ "field-strip" ], "appliesTo": "SUB-2000 (Gen 2 era upload, Aug 2016)", "published": "2016-08-22", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" } ], "procedures": [ { "procedure": "storage-mode", "title": "Folding and Unfolding (Storage Mode)", "level": "field-strip", "configuration": false, "steps": [ { "n": 1, "instruction": "Ensure the weapon is unloaded, with no magazine or ammunition present, and place it in the SAFE configuration." }, { "n": 2, "instruction": "Remove any accessories on the top rail of the forend that would interfere when folded." }, { "n": 3, "instruction": "Rotate the trigger guard down, away from the trigger. The barrel assembly is then free to rotate around the rear sight axis.", "warning": "Your trigger finger and this latch occupy the same space. Move the guard deliberately." }, { "n": 4, "instruction": "Rotate the barrel assembly until it latches into the latching tab in the buffer assembly.", "warning": "The latching tab assists the barrel in staying closed for transport. It is not a lock or a safety." }, { "n": 5, "instruction": "To open from storage mode, press the latching tab rearward, away from the grip, to release the barrel assembly, then rotate it to the chambering position.", "warning": "Do not release the bolt assembly from its notched, locked-back position while the barrel is folded. Doing so could damage the receiver tube." } ] }, { "procedure": "field-strip", "title": "Field Strip", "level": "field-strip", "configuration": false, "steps": [ { "n": 1, "instruction": "Rotate the barrel assembly into the forward position if it was folded, and complete the Clear and Make Safe procedure." }, { "n": 2, "instruction": "Make sure the bolt assembly is forward (closed), the hammer is cocked and the push-bolt safety is engaged." }, { "n": 3, "instruction": "Press the buffer assembly in, towards the front of the weapon. It will move about 3/32 inch before bottoming out on the stock pin." }, { "n": 4, "instruction": "Release a small amount of tension on the buffer assembly so the stock pin can begin to come out.", "tip": "The stock pin is held captive by the buffer assembly. Easing off slightly is what frees it." }, { "n": 5, "instruction": "With a cartridge or other pointed object, press the stock pin out from either side.", "warning": "Keep positive contact with the buffer assembly while the pin comes out — it is under recoil spring tension and parts may fly loose. The pin is not captive once removed. Put it somewhere safe immediately.", "partsFreed": [ "Stock pin" ] }, { "n": 6, "instruction": "Remove the buffer assembly and set it aside.", "partsFreed": [ "Buffer assembly" ] }, { "n": 7, "instruction": "Pull the bolt assembly back by the operating handle and pull out the recoil spring.", "partsFreed": [ "Recoil spring" ] }, { "n": 8, "instruction": "Pull the operating handle out downwards.", "tip": "Downwards, not rearward.", "partsFreed": [ "Operating handle" ] }, { "n": 9, "instruction": "Slide the bolt assembly out of the rear of the receiver tube, and separate it by lifting the bolt head off the bolt.", "partsFreed": [ "Bolt", "Bolt head" ] }, { "n": 10, "instruction": "The stock can be removed or its position adjusted now that the stock pin is out. The barrel assembly can be rotated up for cleaning or inspection." }, { "n": 11, "instruction": "Stop here.", "warning": "Do not release the hammer with the bolt assembly removed — Kel-Tec states this will make the rifle inoperable. Further field stripping is not required for normal operation." } ] } ] }, { "id": "refinish", "title": "Refinish", "components": [ { "name": "Stock pin", "procedure": "field-strip", "level": "field-strip", "step": 5 }, { "name": "Buffer assembly", "procedure": "field-strip", "level": "field-strip", "step": 6 }, { "name": "Recoil spring", "procedure": "field-strip", "level": "field-strip", "step": 7 }, { "name": "Operating handle", "procedure": "field-strip", "level": "field-strip", "step": 8 }, { "name": "Bolt", "procedure": "field-strip", "level": "field-strip", "step": 9 }, { "name": "Bolt head", "procedure": "field-strip", "level": "field-strip", "step": 9 } ], "manufacturerPartsList": { "parts": 76, "scope": "SUB2000 exploded view and parts list (REV #013020), spread across printed pp.26-27; includes both 9mm and .40 S&W caliber-specific rows. Omitted: 'SUB2000 CQB Exclusive Parts' list on pp.28-29." }, "partsDiagrams": [], "materials": [ { "component": "Receiver", "material": "steel", "finish": null, "appliesTo": "SUB2000 Gen2", "note": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "The tubular steel receiver contains the bolt assembly and is ended by the polymer stock." } }, { "component": "Stock", "material": "polymer", "finish": null, "appliesTo": "SUB2000 Gen2", "note": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "The tubular steel receiver contains the bolt assembly and is ended by the polymer stock." } }, { "component": "Grips", "material": "glass reinforced Zytel", "finish": null, "appliesTo": "SUB2000 Gen2", "note": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "The grip is made of an impact modified glass reinforced Zytel." } }, { "component": "Forend", "material": "polymer", "finish": null, "appliesTo": "SUB2000 Gen2", "note": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "The barrel has a spring loaded collar to ensure an accurate lock to the grip, a polymer forend and a fully adjustable front sight (some variants)." } }, { "component": "Bolt", "material": "steel", "finish": null, "appliesTo": "SUB2000 Gen2", "note": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": null, "pdfPage": null, "pageUrl": null, "quote": "The heavy two-piece machined steel bolt holds the firing pin, the extractor, and has the operating handle attached on the bottom." } } ], "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": "SUB-2000 Assembly", "url": "https://www.youtube.com/watch?v=Pmd4HuPog74", "platform": "youtube", "embedUrl": null, "shows": [ "reassembly" ], "appliesTo": "SUB-2000 (Gen 2 era upload, Aug 2016)", "published": "2016-08-22", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" }, { "title": "KelTec SUB-2000 Hammer Reset", "url": "https://www.youtube.com/watch?v=2Mx-wN7l3DY", "platform": "youtube", "embedUrl": null, "shows": [ "reassembly", "maintenance" ], "appliesTo": "SUB-2000 (description: 'This will also work on the GEN1 SUB-2000')", "published": "2016-08-22", "note": null, "channel": { "id": "UCab3Nj3TAOT04TfbvEdpwTA", "name": "KelTec", "url": "https://www.youtube.com/@KelTecWeapons", "owner": "Kel-Tec CNC Industries, Inc." }, "accessed": "2026-10-15" } ], "procedures": [ { "procedure": "reassembly", "title": "Reassembly", "configuration": false, "steps": [ { "n": 1, "instruction": "Assemble the bolt head onto the bolt." }, { "n": 2, "instruction": "Insert the combined bolt and bolt head into the receiver." }, { "n": 3, "instruction": "Line up the operating handle hole with the operating handle slot below, and fully insert the operating handle." }, { "n": 4, "instruction": "Put the recoil spring into the bolt, then slide the bolt assembly forward." }, { "n": 5, "instruction": "Add the stock to the receiver and set the stock position.", "tip": "Position 1 is the shortest overall length; position 2 adds 5/8 inch; position 3 adds 1.25 inches." }, { "n": 6, "instruction": "Add the buffer assembly, pressing the bolt assembly slightly rearward if needed so the recoil spring and buffer assembly line up.", "warning": "The buffer assembly is under recoil spring tension." }, { "n": 7, "instruction": "Press the buffer assembly towards the front of the weapon and line up the slot in the buffer assembly with the desired stock position and the receiver." }, { "n": 8, "instruction": "Push the stock pin completely in.", "warning": "This may take some adjusting of the parts to get complete alignment. Do not drive it against misaligned holes." }, { "n": 9, "instruction": "Release the tension on the buffer assembly and cycle the bolt assembly a few times to check the action." } ], "instruction": null } ] }, { "id": "torque", "title": "Torque", "coverage": "sourced", "manufacturer": [ { "fastener": "Muzzle accessory on the barrel threads", "appliesTo": "Threaded-barrel models", "qualifier": "maximum", "value": 10, "valueMax": null, "unit": "ft-lb", "converted": { "value": { "N-m": 13.6, "in-lb": 120, "ft-lb": 10 }, "valueMax": null }, "sequence": "Hold the rifle by the front sight assembly in a vise, padded so the finish is not damaged, and never clamp the polymer parts. Remove the thread protector counter-clockwise before fitting the accessory.", "threadlocker": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": "13", "pdfPage": 14, "pageUrl": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf#page=14", "quote": "Maximum torque on barrel is 10 ft-lbs. Do NOT tighten accessories onto barrel beyond this torque; doing so may damage weapon." } }, { "fastener": "Front sight locknut", "appliesTo": null, "qualifier": "approximate", "value": 10, "valueMax": null, "unit": "ft-lb", "converted": { "value": { "N-m": 13.6, "in-lb": 120, "ft-lb": 10 }, "valueMax": null }, "sequence": "Rotate the sight onto the barrel until it stops, leaving about 7/16\" of thread exposed at the muzzle, level it to the rifle, then fit the locknut on the 9/16\"-24 threads in front of the sight and torque it. Refit the thread protector until it bottoms against the locknut.", "threadlocker": null, "source": { "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "page": "15", "pdfPage": 16, "pageUrl": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf#page=16", "quote": "Add the wrench to the sight locknut and torque it into the sight to approximately 10 ft-lbs or until it stops moving." } } ], "reported": [], "notes": "From Kel-Tec's SUB2000 / SUB CQB owner's manual (GEN2). Kel-Tec states the barrel maximum twice — as a number and as a warning — because tightening a muzzle accessory past it can damage the rifle." }, { "id": "function-check", "title": "Function check", "checks": [ "Verify the firearm is unloaded with no magazine inserted before each step.", "Cycle the action by hand and confirm the bolt returns fully into battery.", "With the safety on, press the trigger. The hammer or striker must not release.", "Move the safety to fire, cycle the action, and press the trigger. It should release.", "Hold the trigger back, cycle the action, and release slowly to feel the disconnector reset.", "Confirm the magazine seats and locks positively and releases cleanly.", "Confirm the carbine is fully unfolded and the barrel latch is engaged.", "Attempt to fold it without releasing the latch — it must not move." ], "videos": [] } ], "troubleshooting": [ { "symptom": "The stock pin will not go back in.", "cause": "The slot in the buffer assembly, the chosen stock position and the receiver are not all aligned at once.", "fix": "Press the buffer assembly forward against spring tension, line up the buffer slot with the stock position hole and the receiver, then push the pin through. Kel-Tec notes this takes some adjusting of the parts.", "damageRisk": "Driving the pin against misaligned holes burrs the pin and the stock." }, { "symptom": "The stock pin is lost.", "cause": "It is not captive once removed, which Kel-Tec warns about in capitals.", "fix": "It is a service part from Kel-Tec. Do not substitute a pin of approximate diameter — it carries the buffer and recoil spring load.", "seeGunsmith": true }, { "symptom": "The operating handle will not go back in.", "cause": "The hole in the bolt is not lined up with the operating handle slot in the receiver.", "fix": "Slide the bolt until the handle hole sits over the slot, then insert the handle fully before fitting the recoil spring." }, { "symptom": "The rifle is assembled but will not function, and the hammer was dropped during cleaning.", "cause": "The hammer was released with the bolt assembly out.", "fix": "Kel-Tec states this makes the rifle inoperable and it is not something to correct by feel. Have it looked at rather than forcing the action.", "seeGunsmith": true }, { "symptom": "Parts flew loose while removing the stock pin.", "cause": "Positive contact with the buffer assembly was lost while it was under recoil spring tension.", "fix": "Recover the buffer assembly, recoil spring and stock pin, and restart the strip keeping a hand on the buffer throughout.", "damageRisk": "This is the step on this carbine where eye protection matters." } ], "sources": [ { "n": 1, "id": "keltec-sub2000-manual", "title": "Kel-Tec SUB2000 / SUB CQB Owner's Manual", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://media.keltecweapons.com/wp-content/uploads/2022/02/SUB2000-SUB-CQB-Manual_OPT.pdf", "accessed": "2026-09-15" }, { "n": 2, "id": "keltecweapons-notice-3da3b7", "title": "KelTec — KelTec Recall Information: SUB2000 Safety Recall", "publisher": "Kel-Tec CNC Industries, Inc.", "reliability": "primary", "url": "https://www.keltecweapons.com/keltec-recall-information/", "accessed": "2026-10-03" } ] }