---
title: "Get dimensions in both unit systems"
method: GET
path: "/v1/firearms/{id}/dimensions"
tags: ["Firearm Analysis"]
---

# Get dimensions in both unit systems

`GET /v1/firearms/{id}/dimensions`

## Request

- Base URL: `https://api.gunspec.io`
- URL: `https://api.gunspec.io/v1/firearms/{id}/dimensions`
- Auth: one of:
  - API key in header `X-API-Key`
  - HTTP bearer

Returns the physical measurements of a firearm in metric and imperial units.

**Requires Builder tier or higher.**

## Path parameters

- `id` string, required

## Response `200`

Get dimensions in both unit systems

- object
  - `success` boolean, required: Always true on a successful response. Every error carries `false` and an `error` object instead.
  - `data` FirearmDimensions, required: Physical dimensions in both metric and imperial units.
    - `id` string, required: Slug of the firearm.
    - `name` string, required: Display name, as the maker writes it.
    - `metric` object: Every dimension in millimetres and grams.
      - `weightEmptyG` number, nullable: Unloaded weight in grams, without magazine.
      - `weightLoadedG` number, nullable: Loaded weight in grams, with a full magazine.
      - `overallLengthMm` number, nullable: Overall length in millimetres, stock extended where it folds or collapses.
      - `barrelLengthMm` number, nullable: Barrel length in millimetres, measured from the breech face.
      - `heightMm` number, nullable: Height in millimetres, including sights and a fitted magazine.
      - `widthMm` number, nullable: Width in millimetres at the widest point.
      - `foldedLengthMm` number, nullable: Overall length in millimetres with the stock folded or collapsed. Null where it does not.
    - `imperial` object: The same measurements converted to pounds and inches.
      - `weightEmptyLbs` number, nullable: Unloaded weight in pounds, without magazine. Converted from `weightEmptyG`.
      - `weightLoadedLbs` number, nullable: Loaded weight in pounds, with a full magazine. Converted from `weightLoadedG`.
      - `overallLengthIn` number, nullable: Overall length in inches, stock extended where it folds or collapses. Converted from `overallLengthMm`.
      - `barrelLengthIn` number, nullable: Barrel length in inches, measured from the breech face. Converted from `barrelLengthMm`.
      - `heightIn` number, nullable: Height in inches, including sights and a fitted magazine. Converted from `heightMm`.
      - `widthIn` number, nullable: Width in inches at the widest point. Converted from `widthMm`.
      - `foldedLengthIn` number, nullable: Overall length in inches with the stock folded or collapsed. Null where it does not. Converted from `foldedLengthMm`.

## Other responses

- `400`: Validation error
- `401`: Missing or invalid API key
- `403`: The credential is valid and the caller is not permitted. Three causes, none of which reissuing a key changes: the plan is below the endpoint's tier, the account is suspended, or the key is not attached to the thing being acted on, meaning a user account for `/v1/me` or a shop for `/v1/vendor`. Distinct from 401, which means the credential is missing, malformed or expired and a new one can work.
- `404`: Resource not found
- `429`: A limit was reached. `RATE_LIMITED` is the per-minute limit: wait `Retry-After` seconds (a minute) and retry. `DAILY_CAP_EXCEEDED` is the plan's daily limit, per key: nothing will be served until the counters return to zero at midnight UTC. `MONTHLY_CAP_EXCEEDED` is the plan's monthly allowance, for the whole account: nothing will be served until midnight UTC on the first of next month, or until the plan changes. For both, `Retry-After` is the seconds until then and `error.resetsAt` says when as an instant. Calls made after a refusal are refused too and do not spend the month, and a free key that keeps calling is paused, so stop at the first one and resume at the reset.
- `500`: Internal server error

---

[API](https://skmtc.dev/gunspec/apis/gunspec-io-api.md) · [All operations](https://skmtc.dev/gunspec/apis/gunspec-io-api/llms.txt) · [OpenAPI document](https://skmtc.dev/gunspec/apis/gunspec-io-api/revisions/f2e974d8b05c?raw)