Brn-4/Hk416 Bolt Assembly
$79.99 at Brownells
In stock Sale
Brn M16 458 Socom/450 Bushmaster Bolt Carrier Group Nitride
Brownells · Bolt Carrier Group
No ratings yetBest price
$88.79at Brownells
In stock Sale Lowest in 30 dayschecked Nov 13, 2026
Fits and works with
- Bolt
- .458 SOCOM / .450 Bushmaster · Bolt carrier groups
Specifications
- Manufacturer
- Brownells
- Platform
- AR-15
- Caliber
- .450 Bushmaster
- Finish
- Nitride
- Material
- Steel
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells 17.76% off · ends Nov 15 · exclusions apply | $88.79Salechecked Nov 13, 2026 | In 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.
Price history
Lowest in-stock price in the last 30 days: $88.79 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $88.79 | $88.79 | $88.79 |
Since Sep 27, 2026.
About this part
The Brn M16 458 Socom/450 Bushmaster Bolt Carrier Group Nitride is an AR-15 bolt carrier group from Brownells. One store lists it, Brownells at $88.79. The lowest in-stock price in the last 30 days was $88.79 at Brownells.
From the manufacturer
Get your .458 SOCOM or 450 Bushmaster AR-15 running perfectly with the Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group, which features construction and finishing designed to provide the best possible performance in your rifle. The Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group features a bolt head built using 9310 steel, which undergoes heat treatment and shot peening for a durable finish. The carrier itself is made using 8620 steel that undergoes hardening after machining. Undergoes magnetic particle inspection Extractor construction includes rubber insert and spring Increased corrosion resistance offered through black-nitrid Mfg: Brownells
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