Brn-4/Hk416 Bolt Assembly
$79.99 at Brownells
In stock Sale
Best price
$89.80at Brownells
Out of stock Sale checked Oct 22, 2026
In stock now instead
- Brn-4/Hk416 Bolt Assembly $79.99at Brownells
- Brn-180 Gen 1/2 Complete Bolt Assembly $111.99at Brownells
- 5.56 Bolt Assembly $87.00at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $89.80Salechecked Oct 22, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
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This part is out of stock at every store we track. These similar bolt carrier groups are in stock, with today's prices.
Brn-180 Gen 1/2 Complete Bolt Assembly
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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $89.80 | $89.80 | $89.80 |
Since Sep 28, 2026.
About this part
The MP Brn AR-15 5.56mm Bolt Carrier Group, Nitride is a 5.56 / .223 bolt carrier group from Brownells. One store lists it, Brownells at $89.80.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Specifications
- Manufacturer
- Brownells
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Finish
- Nitride
- Material
- Steel
From the manufacturer
Whether you're looking to finish off a new AR-15 build or you need a spare bolt-carrier group to have on-hand as a ready replacement (always a good idea), Brownells has you covered with its AR-15 Bolt Carrier Group. This ready-to-roll BCG is built to provide dependable operation in any AR-15 chambered in 5.56 NATO, .223 Remington or 300 Blackout. Each Brownells AR-15 Bolt-Carrier Group features a bolt machined from 9310 tool steel, which is heat-treated and shot-peened. The carrier itself is machined from 8620 hardened steel. Both of these components, as well as every other part in the bolt-carrier group, are finished in a nitride coating. Every bolt is magnetic-particle inspecte Mfg: Brownells
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