{
  "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": "mosin-nagant-91-30",
    "name": "Mosin-Nagant M91/30",
    "manufacturer": {
      "id": "izhevsk",
      "name": "Izhevsk Mechanical Plant"
    },
    "category": "rifle",
    "action": "bolt-action",
    "calibers": [
      "7.62x54mmR"
    ],
    "alsoKnownAs": [
      "Model 1891/30",
      "Три-линейка",
      "91/30"
    ],
    "coversAlso": [
      "Mosin-Nagant M38",
      "M44 Carbine",
      "Finnish M39 (with differences)",
      "Chinese Type 53"
    ],
    "page": "firearms/mosin-nagant-91-30.html",
    "bundle": "api/v1/firearms/mosin-nagant-91-30.json",
    "lastUpdated": "2026-10-29"
  },
  "notices": [
    "This work order is written for the Mosin-Nagant M91/30. It is reported to cover Mosin-Nagant M38; M44 Carbine; Finnish M39 (with differences); Chinese Type 53 — if the firearm on the bench is one of those, check the torque notes: values do not always carry over.",
    "No torque values are recorded for this firearm. Get them from the manufacturer or a gunsmith; do not estimate."
  ],
  "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": "medium",
    "verification": "community-reviewed"
  },
  "manufacturerDisassembly": {
    "status": "not-recorded",
    "limit": null,
    "statement": null,
    "source": null
  },
  "recalls": [],
  "shopTier": {
    "tier": 1,
    "group": "rifle",
    "rating": "Pew-Takedown editorial rating (1 easy – 3 hardest), not the manufacturer's",
    "reason": "Only about 34 numbered parts (American Rifleman legend), held by screws and simple springs, and it strips with a screwdriver and punches. The fiddly bits are a bolt that must be re-indexed and gauged for firing-pin protrusion, and fragile band springs. None of these needs a held-under-tension pin or timing.",
    "confidence": "medium",
    "partCount": {
      "value": 34,
      "kind": "line-items",
      "covers": "complete Mosin-Nagant Model 1891 family rifle (article states the instructions apply to all patterns; the M91/30 is named as the most common) per the American Rifleman exploded-view 'Parts Legend', ke",
      "basis": "publication-diagram",
      "source": {
        "title": "Exploded View: Mosin-Nagant Model 1891 Family Of Rifles (American Rifleman, July 2016, p. 73), by Ian McCollum",
        "publisher": "NRA / American Rifleman",
        "reliability": "secondary",
        "url": "https://www.americanrifleman.org/media/ofijod0q/r1607_ev.pdf",
        "page": "p. 73 (single-page PDF linked from https",
        "pdfPage": null,
        "pageUrl": null,
        "quote": "34. Buttplate"
      }
    },
    "painPoints": [
      {
        "issue": "The bolt must be reassembled with the cocking piece, guide bar and bolt head in one specific alignment, and the firing pin screwed back to its witness mark.",
        "during": "reassembly",
        "source": {
          "title": "Exploded View: Mosin-Nagant Model 1891 Family Of Rifles",
          "publisher": "American Rifleman (NRA)",
          "reliability": "secondary",
          "url": "https://www.americanrifleman.org/content/exploded-view-mosin-nagant-model-1891-family-of-rifles",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "First, note the witness line at the rear of the cocking piece—this must be put into the same position when the bolt is reassembled (Fig. 6)."
        }
      },
      {
        "issue": "The firing pin is under mainspring tension while it is unscrewed from the cocking piece.",
        "during": "disassembly",
        "source": {
          "title": "Exploded View: Mosin-Nagant Model 1891 Family Of Rifles",
          "publisher": "American Rifleman (NRA)",
          "reliability": "secondary",
          "url": "https://www.americanrifleman.org/content/exploded-view-mosin-nagant-model-1891-family-of-rifles",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "The firing pin is under spring tension, and will jump slightly when fully unscrewed."
        }
      },
      {
        "issue": "Firing-pin protrusion has to be re-checked with a gauge after the bolt is reassembled, or the rifle misfires or pierces primers.",
        "during": "reassembly",
        "source": {
          "title": "Mosin Nagant Rifle Exploded Views and Disassembly",
          "publisher": "7.62x54r.net (hosted by thinlineweapons.com)",
          "reliability": "secondary",
          "url": "https://thinlineweapons.com/7.62x54r/7.62x54r.net/MosinID/MosinDisassembly.html",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "After fully assembling the bolt, decock it, make sure the bolt head is tight against the connector bar and check the firing pin protrusion with a gauge."
        }
      },
      {
        "issue": "The barrel-band retaining springs in the stock are delicate and break if pulled out by the leaf. They must be drifted out from the other side.",
        "during": "disassembly",
        "source": {
          "title": "Mosin Nagant Rifle Exploded Views and Disassembly",
          "publisher": "7.62x54r.net (hosted by thinlineweapons.com)",
          "reliability": "secondary",
          "url": "https://thinlineweapons.com/7.62x54r/7.62x54r.net/MosinID/MosinDisassembly.html",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "These springs are delicate and can be easily broken if pulled out by the leaf."
        }
      },
      {
        "issue": "Loose parts on the way out of the stock: the trigger pin is retained only by the stock, and tang/recoil-lug shims must be kept and put back in place.",
        "during": "both",
        "source": {
          "title": "Mosin Nagant Rifle Exploded Views and Disassembly",
          "publisher": "7.62x54r.net (hosted by thinlineweapons.com)",
          "reliability": "secondary",
          "url": "https://thinlineweapons.com/7.62x54r/7.62x54r.net/MosinID/MosinDisassembly.html",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "The trigger pin is held in place only by the stock and if it is loose can fall out upon removal of the action."
        }
      }
    ],
    "minutes": {
      "strip": 35,
      "rebuild": 50,
      "basis": "estimated",
      "note": "Detail strip of bolt, magazine/trigger guard, bands, sights. Rebuild time is driven by indexing the firing pin to its witness line and gauging protrusion.",
      "source": null
    },
    "stripScope": [
      {
        "assembly": "Stock",
        "removes": [
          "barrel bands and band springs",
          "handguard",
          "cleaning rod",
          "tang screws",
          "buttplate",
          "action (with shims)"
        ]
      },
      {
        "assembly": "Bolt",
        "removes": [
          "cocking piece",
          "firing pin and spring",
          "bolt head",
          "guide bar",
          "extractor"
        ],
        "tools": [
          "firing pin protrusion gauge (combination tool)"
        ]
      },
      {
        "assembly": "Magazine / trigger guard",
        "removes": [
          "floorplate and latch",
          "follower and springs",
          "trigger and pin",
          "sear/trigger spring"
        ]
      },
      {
        "assembly": "Receiver / barrel",
        "removes": [
          "interrupter/ejector and spring",
          "rear sight leaf, slide, spring",
          "front sight (drift)"
        ]
      }
    ],
    "hardware": {
      "pins": 3,
      "springs": 5,
      "detents": 0,
      "basis": "counted by name in the same legend (line items). Pins: 19 trigger hinge pin, 26 follower hinge pin, 32 follower hinge pin (upper) (4 firing pin not counted). Springs: 3 firing pin spring, 11 ejector s"
    },
    "specialTools": [
      {
        "tool": "Mosin combination tool / firing-pin protrusion gauge",
        "usedFor": "Setting firing pin protrusion after bolt reassembly"
      },
      {
        "tool": "hollow-ground screwdrivers",
        "usedFor": "Staked military screws"
      },
      {
        "tool": "small C-clamp",
        "usedFor": "Compressing the rear sight leaf spring"
      }
    ],
    "fitOnRebuild": [
      {
        "check": "Firing-pin protrusion",
        "why": "Incorrect protrusion causes misfires or pierced primers.",
        "source": {
          "title": "Mosin Nagant Rifle Exploded Views and Disassembly",
          "publisher": "7.62x54r.net (hosted by thinlineweapons.com)",
          "reliability": "secondary",
          "url": "https://thinlineweapons.com/7.62x54r/7.62x54r.net/MosinID/MosinDisassembly.html",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "check the firing pin protrusion with a gauge"
        }
      },
      {
        "check": "Tang screw torque / shims",
        "why": "Loose action screws cost accuracy, and shims must go back in place.",
        "source": null
      },
      {
        "check": "Re-zero sights or scope",
        "why": "Sights and optics come off for coating, and point of impact must be re-confirmed. This is a standard check, so no source.",
        "source": null
      }
    ],
    "assessed": "2026-10-29"
  },
  "videos": [],
  "configurations": [],
  "tools": [
    {
      "name": "Issued combination tool / screwdriver",
      "required": false,
      "usedFor": "Bolt disassembly and setting firing pin protrusion. The original tool includes the firing pin protrusion gauge."
    }
  ],
  "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": "Lift the bolt handle and pull the bolt fully to the rear to extract and eject any chambered round."
        },
        {
          "n": 3,
          "instruction": "Press the magazine floorplate latch ahead of the trigger guard and swing the floorplate open to release any rounds in the magazine.",
          "tip": "Alternatively, cycle the bolt repeatedly to feed and eject each round.",
          "partsFreed": [
            "Rounds in the magazine"
          ]
        },
        {
          "n": 4,
          "instruction": "Inspect the chamber and magazine well with a light, then physically confirm the chamber is empty."
        },
        {
          "n": 5,
          "instruction": "Close the floorplate and remove all ammunition from the work area."
        }
      ],
      "videos": []
    },
    {
      "id": "disassemble",
      "title": "Disassemble",
      "videos": [],
      "procedures": [
        {
          "procedure": "field-strip",
          "title": "Field Strip — Bolt Removal",
          "level": "field-strip",
          "configuration": false,
          "steps": [
            {
              "n": 1,
              "instruction": "Complete the Clear and Make Safe procedure."
            },
            {
              "n": 2,
              "instruction": "Lift the bolt handle and draw the bolt fully to the rear."
            },
            {
              "n": 3,
              "instruction": "Press and hold the trigger while continuing to pull the bolt rearward out of the receiver.",
              "warning": "You are pressing the trigger. The chamber and magazine must already be verified empty and the muzzle in a safe direction.",
              "partsFreed": [
                "Bolt assembly"
              ]
            }
          ]
        },
        {
          "procedure": "bolt-disassembly",
          "title": "Bolt Disassembly",
          "level": "detail-strip",
          "configuration": false,
          "steps": [
            {
              "n": 1,
              "instruction": "Hold the bolt body and pull the cocking piece at the rear straight back, then rotate it to disengage it from the bolt body."
            },
            {
              "n": 2,
              "instruction": "Separate the bolt head and connector bar from the bolt body.",
              "partsFreed": [
                "Bolt head",
                "Connector bar"
              ]
            },
            {
              "n": 3,
              "instruction": "Unscrew the cocking piece from the firing pin, counting turns if you want a reference point.",
              "warning": "The mainspring is under compression. Control it.",
              "partsFreed": [
                "Cocking piece",
                "Firing pin",
                "Mainspring"
              ]
            },
            {
              "n": 4,
              "instruction": "Clean every component and the firing pin channel until free of cosmoline and fouling. Reinstall dry."
            }
          ]
        }
      ]
    },
    {
      "id": "refinish",
      "title": "Refinish",
      "components": [
        {
          "name": "Bolt assembly",
          "procedure": "field-strip",
          "level": "field-strip",
          "step": 3
        },
        {
          "name": "Bolt head",
          "procedure": "bolt-disassembly",
          "level": "detail-strip",
          "step": 2
        },
        {
          "name": "Connector bar",
          "procedure": "bolt-disassembly",
          "level": "detail-strip",
          "step": 2
        },
        {
          "name": "Cocking piece",
          "procedure": "bolt-disassembly",
          "level": "detail-strip",
          "step": 3
        },
        {
          "name": "Firing pin",
          "procedure": "bolt-disassembly",
          "level": "detail-strip",
          "step": 3
        },
        {
          "name": "Mainspring",
          "procedure": "bolt-disassembly",
          "level": "detail-strip",
          "step": 3
        }
      ],
      "manufacturerPartsList": null,
      "partsDiagrams": [],
      "materials": [],
      "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": [],
      "procedures": [
        {
          "procedure": "bolt-disassembly",
          "title": "Bolt Disassembly",
          "configuration": false,
          "steps": [
            {
              "n": 5,
              "instruction": "Reassemble the firing pin and cocking piece, then set firing pin protrusion using the gauge slot on the combination tool: with the bolt assembled and the firing pin forward, the tip must protrude within the gauge's limits.",
              "warning": "This is the critical step. Incorrect protrusion causes misfires, pierced primers, or slam fires. If you do not have the gauge, have a gunsmith set it."
            },
            {
              "n": 6,
              "instruction": "Reassemble the bolt head and connector bar to the bolt body and confirm the bolt cycles and cocks correctly before reinstalling it in the rifle."
            }
          ],
          "instruction": null
        },
        {
          "procedure": "reassembly",
          "title": "Reassembly",
          "configuration": false,
          "steps": [
            {
              "n": 1,
              "instruction": "Confirm firing pin protrusion has been set correctly if the bolt was disassembled.",
              "warning": "Do not skip this. It is a safety-critical dimension."
            },
            {
              "n": 2,
              "instruction": "Align the bolt with the receiver raceway, with the connector bar riding in its groove."
            },
            {
              "n": 3,
              "instruction": "Slide the bolt forward into the receiver and close the bolt handle."
            },
            {
              "n": 4,
              "instruction": "Cycle the bolt several times to confirm smooth operation and correct cocking, then perform the function check."
            }
          ],
          "instruction": null
        }
      ]
    },
    {
      "id": "torque",
      "title": "Torque",
      "coverage": "none-recorded",
      "manufacturer": [],
      "reported": [],
      "notes": "The official military manuals give no torque value. They say: \"67. Заканчивая осмотр винтовки в собранном виде, проверить, правильно ли довинчены винты хвостовой и упора. Чрезмерное завинчивание винта упора может повлечь за собой расшатывание угольника в соединении со щеками магазинной коробки, особенно если магазинная коробка верхним краем упирается снизу в ствольную коробку.\" [translation by this project: \"67. On finishing inspection of the assembled rifle, check that the tang screw and the recoil screw are properly screwed home. Over-tightening the recoil screw can loosen the trigger-guard plate's joint with the sides of the magazine box, especially if the top edge of the magazine box bears against the underside of the receiver.\"] (Наставление по стрелковому делу (НСД-38). Винтовка обр. 1891/30 г. (1941 printing), p. 58 (PDF p. 62), ст. 67) \"д) неравномерно завинчены винты упора и хвостовой (недовинчены или перетянуты) — пули уклоняются вверх или вниз;\" [translation by this project: \"e) the recoil and tang screws are unevenly tightened (under-tightened or over-tightened) — bullets deviate upward or downward;\"] (Наставление по стрелковому делу (НСД-38). Винтовка обр. 1891/30 г. (1941 printing), p. 77 (PDF p. 81), ст. 120)"
    },
    {
      "id": "function-check",
      "title": "Function check",
      "checks": [
        "Verify the rifle is unloaded before each step.",
        "Cycle the bolt and confirm it cocks on opening and closes fully.",
        "With the bolt closed and cocked, pull the cocking piece back and rotate it to the safe position. Confirm the trigger is blocked.",
        "Return the safety and press the trigger — the firing pin should release with a firm snap.",
        "Confirm firing pin protrusion with the gauge if the bolt was apart.",
        "Load five dummy rounds and confirm the interrupter feeds them one at a time without rim lock."
      ],
      "videos": []
    }
  ],
  "troubleshooting": [],
  "sources": [
    {
      "n": 1,
      "id": null,
      "title": "7.62mm Mosin-Nagant Rifle Model 1891/30 Manual",
      "publisher": "USSR Ministry of Defence",
      "reliability": "primary",
      "url": null,
      "accessed": null
    },
    {
      "n": 2,
      "id": null,
      "title": "Small Arms Identification and Operation Guide — Eurasian Communist Countries",
      "publisher": "U.S. Defense Intelligence Agency",
      "reliability": "secondary",
      "url": null,
      "accessed": null
    },
    {
      "n": 3,
      "id": "1941-scan-hosted-on-archive-org-a86efb",
      "title": "Наставление по стрелковому делу (НСД-38). Винтовка обр. 1891/30 г. (1941 printing)",
      "publisher": "Народный комиссариат обороны СССР (Воениздат НКО), 1941 — scan hosted on archive.org",
      "reliability": "primary",
      "url": "https://archive.org/details/nastavleniepostrelkovomudelunsd3888",
      "accessed": "2026-09-27"
    },
    {
      "n": 4,
      "id": "tier-a38652c8",
      "title": "Exploded View: Mosin-Nagant Model 1891 Family Of Rifles",
      "publisher": "American Rifleman (NRA)",
      "reliability": "secondary",
      "url": "https://www.americanrifleman.org/content/exploded-view-mosin-nagant-model-1891-family-of-rifles",
      "accessed": "2026-10-29"
    },
    {
      "n": 5,
      "id": "tier-4bb0a973",
      "title": "Mosin Nagant Rifle Exploded Views and Disassembly",
      "publisher": "7.62x54r.net (hosted by thinlineweapons.com)",
      "reliability": "secondary",
      "url": "https://thinlineweapons.com/7.62x54r/7.62x54r.net/MosinID/MosinDisassembly.html",
      "accessed": "2026-10-29"
    },
    {
      "n": 6,
      "id": "tier-7d266e14",
      "title": "Exploded View: Mosin-Nagant Model 1891 Family Of Rifles (American Rifleman, July 2016, p. 73), by Ian McCollum",
      "publisher": "NRA / American Rifleman",
      "reliability": "secondary",
      "url": "https://www.americanrifleman.org/media/ofijod0q/r1607_ev.pdf",
      "accessed": "2026-10-29"
    }
  ]
}