M4 Mil-Spec Buffer Tube Assembly
$43.99 at Brownells
In stock Sale
Best price
$44.99at GunMag Warehouse
In stock checked Oct 21, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| GunMag Warehouse Best price | $44.99checked Oct 21, 2026 | In stock | Buy at GunMag Warehouse | |
| Brownells | $49.95checked Oct 21, 2026 | In stock | Buy at Brownells | |
| MidwayUSA | $49.95checked Oct 21, 2026 | In stock | Buy at MidwayUSA | |
| Kentucky Gun Co | $49.95checked Oct 21, 2026 | In stock | Buy at Kentucky Gun Co | |
| OpticsPlanet | $53.99Salechecked Oct 21, 2026 | In stock | Buy at OpticsPlanet | |
| Ammunition Depot | $54.99checked Oct 21, 2026 | In stock | Buy at Ammunition Depot | |
| Battlehawk Armory | $49.95Salechecked Oct 21, 2026 | Check store | Buy at Battlehawk Armory | |
| Palmetto State Armory | $49.99Salechecked Oct 21, 2026 | Check store | Buy at Palmetto State Armory |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $44.99 at GunMag Warehouse. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $54.99 | $52.49 | $54.99 |
| Battlehawk Armory | $49.95 | $49.95 | $49.95 |
| Brownells | $49.95 | $49.95 | $49.95 |
| GunMag Warehouse | $44.99 | $44.99 | $44.99 |
| Kentucky Gun Co | $49.95 | $49.95 | $49.95 |
| MidwayUSA | $49.95 | $49.95 | $49.95 |
| OpticsPlanet | $53.99 | $53.99 | $53.99 |
| Palmetto State Armory | $49.99 | $49.99 | $49.99 |
Since Sep 27, 2026.
About this part
The Mk Mk2 Receiver Extension is an AR-10 buffer part from Bravo Company MFG. It's sold by 8 stores (6 in stock), from $44.99 to $54.99. The lowest in-stock price in the last 30 days was $44.99 at GunMag Warehouse.
Specifications
- Manufacturer
- Bravo Company MFG
- Type
- Buffer Tube
- Platform
- AR-10
- Material
- Aluminum
From the manufacturer
The BCM MK2 Receiver Extension for your AR15, M16, M4. Machined from 7075T6 and manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extensions have a slightly smaller dimension where the stock slides on. Hard Coat Anodized per Mil-A-8625F, Type III, Class 2 These tubes should be used with stocks such as USGI, BCMGUNFIGHTER(TM), Colt, LMT, SOPMOD, VLTOR, Stag Arms, and others that a made to the Mil-Spec size. THESE RECEIVER EXTENSIONS CAN ALSO BE USED ON MOST AR-10s. *NOTE* These buffer tubes require a M16 rifle action spring and specific BCM MK2 buffer, carbine and rifle buffers will NOT work. Mfg: Bravo Company
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