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SBM4 Pistol Stabilizing Brace

Non-adjustable rubber brace that slides over a standard AR pistol buffer tube and is retained by the tube's shape. No receiver extension included. The simplest SB Tactical brace for AR pistols.

SBM4 Pistol Stabilizing Brace
Category
Brace
Manufacturer
SB Tactical
Weight
255 g
Mounts at
Not recorded

Specification

Everything measured

IdentityWhat it is and who made it.

Category
Brace
Manufacturer
SB Tactical
Model number
SBM4-01-SB
Factory part
No

Dimensions

Weight
255 g

FitmentThe interface it offers and the one it needs, rather than a list of guns it claims to fit.

Needs

  • AR pistol buffer tube (no castle nut, brace-only)stock:ar-pistol-buffer

ProvenanceEvery figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.

Confidence in this record

95%

Stockists

Where to buy

Offers link straight to the shop. GunSpec never takes the order.

No shop has listed this part yet

Stock and prices come from the shops themselves. If you sell this part, you can list it and it appears here.

List a part

Compatibility

Which firearms take this part

Studio

Every firearm this threads onto, resolved

Not a list the maker typed out: the answer comes from the interface this part needs and the mounts each firearm exposes, so it stays right when either one changes.

  • The reverse lookup on every part in the catalogue
  • Interface standards, platforms and fit overrides
  • The same answers through the API and the MCP server

Requires a signed-in GunSpec account on the Studio plan. The answer is computed per firearm, so it is not part of the public record.

API

The call that returns this record

The same fields, in the same units, from the same endpoint the page reads.

curl --request GET \  --url 'https://api.gunspec.io/v1/attachments/sb-tactical-sbm4' \  --header 'X-API-Key: your_key'
Response
{  "id": "sb-tactical-sbm4",  "name": "SBM4 Pistol Stabilizing Brace",  "category": "brace",  "manufacturer": {    "id": "sb-tactical",    "name": "SB Tactical"  },  "weight_g": 255,  "length_mm": null,  "requires_position": null,  "provides": [],  "requires": [    [      {        "id": "stock:ar-pistol-buffer",        "name": "AR pistol buffer tube (no castle nut, brace-only)",        "kind": "stock_mount"      }    ]  ]}