M16 Bolt Carrier Group 458 Socom/450 BM Nitride MP

Best price

$97.64at Brownells

checked Sep 30, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$97.64checked Sep 30, 2026	Check store	Buy at Brownells

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About this part

The M16 Bolt Carrier Group 458 Socom/450 BM Nitride MP is an AR-15 bolt carrier group from Brownells. One store lists it, Brownells at $97.64.

Fits and works with

Bolt: .458 SOCOM / .450 Bushmaster · Bolt carrier groups

Specifications

Manufacturer: Brownells
Platform: AR-15

From the manufacturer

Constructed and Finished for the Big-Bore .458

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-nitride finish
Features torqued and staked gas key

The Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group provides users with a complete assembly, also including a firing pin, cam pin and a firing pin retaining pin.