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

   1{2  "name": "gunspec_get_caliber",3  "arguments": {4    "id": "9x19mm-parabellum"5  }6}

3. 3

   The server answers

   Result

   json

   1{2  "id": "9x19mm-parabellum",3  "name": "9x19mm Parabellum",4  "aliases": "[\"7N21\",\"7N31\",\"9mm\",\"9mm +P\",\"9mm Luger\",\"9mm M38\",\"9mm M38 (Italian high-pressure variant)\",\"9mm NATO\",\"9mm Para\",\"9mm Parabellum\",\"9mm patron m/39\",\"9x19mm\",\"9x19mm 7N21\",\"9x19mm NATO\"]",5  "natoDesignation": "9mm NATO",6  "bulletDiameterMm": 9.01,7  "neckDiameterMm": 9.65,8  "baseDiameterMm": 9.93,9  "caseLengthMm": 19.15,10  "overallLengthMm": 29.69,11  "maxPressureMpa": 235,12  "maxPressurePsi": 34084,13  "typicalBulletWeightG": 7.45,14  "typicalMuzzleVelocityMps": 360,15  "typicalMuzzleEnergyJ": 481,16  "primerType": "small_pistol",17  "cartridgeType": "rimless",18  "parentCartridgeId": "7-65x21mm-parabellum",19  "yearIntroduced": 1902,20  "designer": "Georg Luger",21  "rimDiameterMm": 9.96,22  "rimThicknessMm": 1.27,23  "shoulderDiameterMm": null,24  "bulletLengthMm": 12.9,25  "caseShape": "tapered",26  "caseMaterial": "brass",27  "projectileKind": "bullet",28  "bulletProfile": "round_nose",29  "closure": "bullet",30  "markingColor": null,31  "markingMeaning": null,32  "specSource": "https://en.wikipedia.org/wiki/9%C3%9719mm_Parabellum",33  "specStandard": "cip",34  "dataConfidence": 0.95,35  "verifiedAt": "2026-09-08",36  "verifiedFields": "[\"exists\",\"bullet_diameter_mm\",\"neck_diameter_mm\",\"base_diameter_mm\",\"rim_diameter_mm\",\"rim_thickness_mm\",\"case_length_mm\",\"overall_length_mm\",\"primer_type\",\"max_pressure_mpa\"]",37  "createdAt": "2026-02-11 23:44:40",38  "updatedAt": "2026-09-10 01:25:59",39  "version": "cd56221351785b333a9eaa665adaa165b5cfe2544a8c60dbb031349bfe9fe918",40  "provenance": {41    "sources": [],42    "sourceKinds": [],43    "bestSourceKind": null,44    "dataConfidence": 0.95,45    "verifiedAt": "2026-09-08",46    "verifiedFields": [47      "exists",48      "bullet_diameter_mm",49      "neck_diameter_mm"50    ],51    "specSource": "https://en.wikipedia.org/wiki/9%C3%9719mm_Parabellum",52    "updatedAt": "2026-09-10 01:25:59",53    "version": "cd56221351785b333a9eaa665adaa165b5cfe2544a8c60dbb031349bfe9fe918"54  }55}

   Captured from the live API on Sep 17, 2026. Lists and long text are shortened for display.

Related references

Arguments