{
  "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": "fn-five-seven",
    "name": "FN Five-seveN",
    "manufacturer": {
      "id": "fn-herstal",
      "name": "FN Herstal"
    },
    "category": "pistol",
    "action": "delayed-blowback",
    "calibers": [
      "5.7x28mm"
    ],
    "alsoKnownAs": [
      "FN 5.7",
      "Five-seveN MK2"
    ],
    "coversAlso": [
      "Five-seveN MK2",
      "Five-seveN MRD"
    ],
    "page": "firearms/fn-five-seven.html",
    "bundle": "api/v1/firearms/fn-five-seven.json",
    "lastUpdated": "2026-10-29"
  },
  "notices": [
    "FN Herstal limits owner disassembly: Field strip only: slide assembly off the frame, barrel (with recoil spring) out of the slide.",
    "This work order is written for the FN Five-seveN. It is reported to cover Five-seveN MK2; Five-seveN MRD — 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": "limited",
    "limit": "Field strip only: slide assembly off the frame, barrel (with recoil spring) out of the slide.",
    "statement": "FN says the field strip is enough for thorough cleaning and that further disassembly should only be done by a qualified armorer or the FN Service Center.",
    "source": {
      "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
      "publisher": "FN America, LLC",
      "reliability": "primary",
      "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
      "page": "43",
      "pdfPage": 23,
      "pageUrl": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf#page=23",
      "quote": "This level of disassembly is sufficient to perform thorough cleaning. Further disassembly should only be carried out by a qualified armorer or by the FN Service Center."
    }
  },
  "recalls": [],
  "shopTier": {
    "tier": 2,
    "group": "pistol",
    "rating": "Pew-Takedown editorial rating (1 easy – 3 hardest), not the manufacturer's",
    "reason": "No parts count found. A hammer-fired delayed-blowback pistol with a polymer-clad steel slide; FN limits all work past the field strip to an armorer or the FN Service Center, and even the owner-level magazine catch swap needs the trigger held back while the spring is pulled and re-seated in a set orientation. Rated Tier 2 on design and FN's restrictions, not on counted parts.",
    "confidence": "low",
    "partCount": null,
    "painPoints": [
      {
        "issue": "FN limits disassembly beyond the field strip to a qualified armorer or the FN Service Center.",
        "during": "both",
        "source": {
          "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
          "publisher": "FN America, LLC",
          "reliability": "primary",
          "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "Further disassembly should only be carried out by a qualified armorer or by the FN Service Center."
        }
      },
      {
        "issue": "The magazine catch spring can only be pulled with the trigger held to the rear and a 3/32 in. punch.",
        "during": "disassembly",
        "source": {
          "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
          "publisher": "FN America, LLC",
          "reliability": "primary",
          "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "While pulling the trigger and using a 3/32” drift punch, pull the magazine catch spring out of its housing inside the frame and then remove it."
        }
      },
      {
        "issue": "The magazine catch spring goes back in one orientation only, again with the trigger held back.",
        "during": "reassembly",
        "source": {
          "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
          "publisher": "FN America, LLC",
          "reliability": "primary",
          "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "While pulling the trigger, reinstall the magazine catch spring, oriented as shown, into its housing inside the frame."
        }
      }
    ],
    "minutes": {
      "strip": 30,
      "rebuild": 40,
      "basis": "estimated",
      "note": "Estimate for an experienced tech with the right tools, detail strip to coatable parts (slide internals, frame pins, trigger group, sights) and rebuild to a function-checked gun; scale used across pistols: Glock-pattern 15/20 min, other strikers 20-30/25-40, DA/SA hammer guns 30-35/45-50, Hi-Power, Colt 1903 and Mark 23 40-45/60-75. No parts list; hammer-fired with polymer-clad slide;",
      "source": null
    },
    "stripScope": [
      {
        "assembly": "Slide",
        "removes": [
          "firing pin and spring",
          "extractor",
          "sights"
        ]
      },
      {
        "assembly": "Barrel",
        "removes": [
          "barrel",
          "recoil spring assembly"
        ]
      },
      {
        "assembly": "Frame",
        "removes": [
          "magazine catch and spring",
          "hammer and trigger group",
          "takedown lever",
          "slide stop"
        ],
        "tools": [
          "3/32 in. drift punch"
        ]
      }
    ],
    "hardware": null,
    "specialTools": [
      {
        "tool": "3/32 in. drift punch",
        "usedFor": "Magazine catch spring"
      }
    ],
    "fitOnRebuild": [
      {
        "check": "Magazine catch spring orientation",
        "why": "The spring goes back in one orientation with the trigger held to the rear",
        "source": {
          "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
          "publisher": "FN America, LLC",
          "reliability": "primary",
          "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
          "page": null,
          "pdfPage": null,
          "pageUrl": null,
          "quote": "While pulling the trigger, reinstall the magazine catch spring, oriented as shown, into its housing inside the frame."
        }
      },
      {
        "check": "Sight position / re-zero",
        "why": "Drift or pressed sights moved for coating shift point of impact unless witness-marked and returned to the same spot",
        "source": null
      },
      {
        "check": "Full function check (trigger reset, safeties, slide lock-back, drop of striker/hammer only on trigger)",
        "why": "Standard after any fire-control strip; confirms springs and sears went back correctly",
        "source": null
      }
    ],
    "assessed": "2026-10-29"
  },
  "videos": [],
  "configurations": [],
  "tools": [],
  "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": "Press the magazine release and remove the magazine.",
          "partsFreed": [
            "Magazine"
          ]
        },
        {
          "n": 3,
          "instruction": "Retract the slide fully to eject any chambered round and lock it open."
        },
        {
          "n": 4,
          "instruction": "Visually inspect the chamber and magazine well, then physically feel the chamber to confirm it is empty.",
          "warning": "Look and feel. Both, every time."
        },
        {
          "n": 5,
          "instruction": "Remove all live ammunition from the work area."
        }
      ],
      "videos": []
    },
    {
      "id": "disassemble",
      "title": "Disassemble",
      "videos": [],
      "procedures": [
        {
          "procedure": "field-strip",
          "title": "Field Strip",
          "level": "field-strip",
          "configuration": false,
          "steps": [
            {
              "n": 1,
              "instruction": "Complete the Clear and Make Safe procedure. After the safety checks, do NOT insert a magazine."
            },
            {
              "n": 2,
              "instruction": "Hold the pistol in your right hand. With the palm of your left hand, push the slide about 0.5 cm (0.25 in) rearwards and hold it there.",
              "tip": "A quarter of an inch. Not locked back."
            },
            {
              "n": 3,
              "instruction": "At the same time, with your left thumb, push the take down lever completely rearwards and hold it there.",
              "tip": "Rearwards, not rotated down. This is a sliding lever, not a rotating one."
            },
            {
              "n": 4,
              "instruction": "Release the slide so that it returns forward."
            },
            {
              "n": 5,
              "instruction": "With your right thumb, push forwards on the rear end of the slide to disengage the complete slide assembly from the frame, then lift the slide assembly up and off the frame.",
              "tip": "Up and off, not forward off the front.",
              "partsFreed": [
                "Slide assembly"
              ]
            },
            {
              "n": 6,
              "instruction": "With the slide assembly held upside down, disengage the rear end of the barrel and take the barrel out of the slide.",
              "partsFreed": [
                "Barrel"
              ]
            },
            {
              "n": 7,
              "instruction": "Stop here. FN states this level of disassembly is sufficient for thorough cleaning, and that anything further should be done only by an authorised armorer or by FN Herstal or FN America."
            }
          ]
        }
      ]
    },
    {
      "id": "refinish",
      "title": "Refinish",
      "components": [
        {
          "name": "Slide assembly",
          "procedure": "field-strip",
          "level": "field-strip",
          "step": 5
        },
        {
          "name": "Barrel",
          "procedure": "field-strip",
          "level": "field-strip",
          "step": 6
        }
      ],
      "manufacturerPartsList": null,
      "partsDiagrams": [],
      "materials": [
        {
          "component": "Slide",
          "material": "steel",
          "finish": null,
          "appliesTo": "FN Five-seveN (standard, 4.8in)",
          "note": null,
          "source": {
            "title": "FN Five-seveN® — product page (Specs / Primary Features)",
            "publisher": "FN America, LLC",
            "reliability": "primary",
            "url": "https://fnamerica.com/products/pistols/fn-five-seven/",
            "page": null,
            "pdfPage": null,
            "pageUrl": null,
            "quote": "SLIDE … One-piece machined steel slide … Polymer cover"
          }
        },
        {
          "component": "Barrel",
          "material": "stainless steel",
          "finish": null,
          "appliesTo": "FN Five-seveN (standard, 4.8in)",
          "note": null,
          "source": {
            "title": "FN Five-seveN® — product page (Specs / Primary Features)",
            "publisher": "FN America, LLC",
            "reliability": "primary",
            "url": "https://fnamerica.com/products/pistols/fn-five-seven/",
            "page": null,
            "pdfPage": null,
            "pageUrl": null,
            "quote": "BARREL … Cold hammer-forged stainless steel … Chrome-lined chamber and bore"
          }
        },
        {
          "component": "Frame",
          "material": "Polymer",
          "finish": null,
          "appliesTo": "FN Five-seveN (standard, 4.8in)",
          "note": null,
          "source": {
            "title": "FN Five-seveN® — product page (Specs / Primary Features)",
            "publisher": "FN America, LLC",
            "reliability": "primary",
            "url": "https://fnamerica.com/products/pistols/fn-five-seven/",
            "page": null,
            "pdfPage": null,
            "pageUrl": null,
            "quote": "FRAME … Polymer construction"
          }
        },
        {
          "component": "Magazine",
          "material": "Polymer",
          "finish": null,
          "appliesTo": "FN Five-seveN (standard, 4.8in)",
          "note": null,
          "source": {
            "title": "FN Five-seveN® — product page (Specs / Primary Features)",
            "publisher": "FN America, LLC",
            "reliability": "primary",
            "url": "https://fnamerica.com/products/pistols/fn-five-seven/",
            "page": null,
            "pdfPage": null,
            "pageUrl": null,
            "quote": "MAGAZINE … Polymer body … Low-friction follower … Polymer base"
          }
        }
      ],
      "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": "reassembly",
          "title": "Reassembly",
          "configuration": false,
          "steps": [
            {
              "n": 1,
              "instruction": "Check every component is perfectly clean before you start."
            },
            {
              "n": 2,
              "instruction": "Insert the muzzle of the barrel into the barrel opening at the front of the slide."
            },
            {
              "n": 3,
              "instruction": "Push the barrel slightly forwards against the force of the return spring, then fit the rear end of the barrel into position in the slide."
            },
            {
              "n": 4,
              "instruction": "Before going further, check three things: the take down lever is at the rear position, the frame holds no magazine, and the hammer is cocked.",
              "tip": "All three. Any one of them wrong and the slide will not go back on."
            },
            {
              "n": 5,
              "instruction": "Holding the slide assembly parallel above the frame, align the rear end of the slide assembly with the front end of the frame's rear guide rails, then seat it."
            },
            {
              "n": 6,
              "instruction": "Return the take down lever forward, cycle the slide, and perform the function check."
            }
          ],
          "instruction": null
        }
      ]
    },
    {
      "id": "torque",
      "title": "Torque",
      "coverage": "sourced",
      "manufacturer": [
        {
          "fastener": "Optic securing screws (T10 Torx), with interface plate if applicable",
          "appliesTo": "FN Five-seveN MRD (optics-ready slide)",
          "qualifier": "exact",
          "value": 22,
          "valueMax": null,
          "unit": "in-lb",
          "converted": {
            "value": {
              "N-m": 2.5,
              "in-lb": 22,
              "ft-lb": 1.8
            },
            "valueMax": null
          },
          "sequence": "Remove cover plate; clean mounting surface; select securing screws and interface per chart; remove lubrication from screws and holes; position optic (with interface if required); add threadlocker to both screws and tighten clockwise with the T10 wrench.",
          "threadlocker": "\"Add a medium-strength threadlocker, such as Loctite Blue 242® to both securing screws\" and follow its cure time",
          "source": {
            "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
            "publisher": "FN America, LLC",
            "reliability": "primary",
            "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
            "page": "PDF p. 21 (5.1 Installing an optic)",
            "pdfPage": 21,
            "pageUrl": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf#page=21",
            "quote": "The recommended torque is 22 in-lbs."
          }
        },
        {
          "fastener": "Cover plate securing screws (T10 Torx)",
          "appliesTo": "FN Five-seveN MRD (optics-ready slide)",
          "qualifier": "exact",
          "value": 22,
          "valueMax": null,
          "unit": "in-lb",
          "converted": {
            "value": {
              "N-m": 2.5,
              "in-lb": 22,
              "ft-lb": 1.8
            },
            "valueMax": null
          },
          "sequence": null,
          "threadlocker": null,
          "source": {
            "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
            "publisher": "FN America, LLC",
            "reliability": "primary",
            "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
            "page": "PDF p. 22 (5.2 Removing an optic, cover ",
            "pdfPage": 22,
            "pageUrl": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf#page=22",
            "quote": "The recommended torque is 22 in-lbs."
          }
        }
      ],
      "reported": [],
      "notes": null
    },
    {
      "id": "function-check",
      "title": "Function check",
      "checks": [
        "Verify the pistol is unloaded with no magazine inserted before each check.",
        "Rack the slide and press the trigger. The striker should release cleanly.",
        "Hold the trigger to the rear, rack the slide, then release slowly and confirm the reset.",
        "Press the trigger again to confirm the striker releases.",
        "Confirm the slide locks open on an empty magazine and the magazine drops free."
      ],
      "videos": []
    }
  ],
  "troubleshooting": [
    {
      "symptom": "The slide will not go back onto the frame.",
      "cause": "One of FN's three preconditions is unmet: the takedown lever must be rearward, the frame must hold no magazine, and the hammer must be cocked.",
      "fix": "Check all three, then hold the slide parallel above the frame and align its rear with the front of the frame's rear guide rails."
    }
  ],
  "sources": [
    {
      "n": 1,
      "id": null,
      "title": "FN Five-seveN MK2 Owner's Manual",
      "publisher": "FN America, LLC",
      "reliability": "primary",
      "url": "https://fnamerica.wpenginepowered.com/wp-content/uploads/2020/06/2005_Five-seveN_OM_05.20201_V2.pdf",
      "accessed": "2026-09-15"
    },
    {
      "n": 2,
      "id": "fn-america-llc-e3a2a1",
      "title": "FN Five-seveN Series Owner's Manual (MRD edition, FN010 2204)",
      "publisher": "FN America, LLC",
      "reliability": "primary",
      "url": "https://fnamerica.com/wp-content/uploads/2022/07/FN010_2204_Five-seveN-MRD_Manual_web.pdf",
      "accessed": "2026-09-27"
    },
    {
      "n": 3,
      "id": "fnamerica-specs-0abcd9",
      "title": "FN Five-seveN® — product page (Specs / Primary Features)",
      "publisher": "FN America, LLC",
      "reliability": "primary",
      "url": "https://fnamerica.com/products/pistols/fn-five-seven/",
      "accessed": "2026-10-03"
    }
  ]
}