GunSpec

All 39 single-call tools

Get a caliber

  • gunspec_get_caliber
  • Explorer
  • Read-only

Returns the full record for one cartridge: SAAMI/CIP dimensions, case shape, projectile, origin, parent cartridge and provenance.

Example usage

  1. 1

    A person asks

    • What are the dimensions of the 9x19mm Parabellum cartridge?
  2. 2

    The assistant calls the tool

    tools/call
    json
    {  "name": "gunspec_get_caliber",  "arguments": {    "id": "9x19mm-parabellum"  }}
  3. 3

    The server answers

    Result
    json
    {  "id": "9x19mm-parabellum",  "name": "9x19mm Parabellum",  "aliases": [    "7N21",    "7N31",    "9mm"  ],  "natoDesignation": "9mm NATO",  "bulletDiameterMm": 9.01,  "neckDiameterMm": 9.65,  "baseDiameterMm": 9.93,  "caseLengthMm": 19.15,  "overallLengthMm": 29.69,  "maxPressureMpa": 235,  "maxPressurePsi": 34084,  "typicalBulletWeightG": 7.45,  "typicalMuzzleVelocityMps": 360,  "typicalMuzzleEnergyJ": 481,  "primerType": "small_pistol",  "cartridgeType": "rimless",  "parentCartridgeId": "7-65x21mm-parabellum",  "yearIntroduced": 1902,  "designer": "Georg Luger",  "rimDiameterMm": 9.96,  "rimThicknessMm": 1.27,  "shoulderDiameterMm": null,  "bulletLengthMm": 12.9,  "caseShape": "tapered",  "caseMaterial": "brass",  "projectileKind": "bullet",  "bulletProfile": "round_nose",  "closure": "bullet",  "markingColor": null,  "markingMeaning": null,  "specSource": "https://bobp.cip-bobp.org/uploads/tdcc/tab-iv/tabivcal-en-page28.pdf",  "specStandard": "cip",  "dataConfidence": 0.95,  "verifiedAt": "2026-10-03",  "verifiedFields": [    "base_diameter_mm",    "bullet_diameter_mm",    "case_length_mm"  ],  "createdAt": "2026-02-11 23:44:40",  "updatedAt": "2026-10-04 11:27:58",  "version": "d19f758e24071a6793e3a3509f859f72c856ac63aa8edeb1d909fb8392649840",  "provenance": {    "sources": [],    "sourceKinds": [],    "bestSourceKind": null,    "makerSource": null,    "evidence": "verified",    "dataConfidence": 0.95,    "verifiedAt": "2026-10-03",    "verifiedFields": [      "base_diameter_mm",      "bullet_diameter_mm",      "case_length_mm"    ],    "specSource": "https://bobp.cip-bobp.org/uploads/tdcc/tab-iv/tabivcal-en-page28.pdf",    "updatedAt": "2026-10-04 11:27:58",    "version": "d19f758e24071a6793e3a3509f859f72c856ac63aa8edeb1d909fb8392649840"  }}

    Captured from the live API on Oct 22, 2026. Lists and long text are shortened for display.

Related references

Arguments

  • stringrequired

    The caliber slug, e.g. as returned by a list or search tool.

    Sent as
    {id}

Each argument is sent to GET /v1/calibers/{id} as the parameter shown, so the same request can be made to the API directly, with your key, if you want to shape what comes back.

json