Bushmaster™ 5.56/350/300BLK Bolt Carrier Assembly

Write a Review

Product Description

The bolt assembly is machined from the correct Mil-Spec Carpenter No. 158® steel, shot peened for increased strength, includes tool steel machined extractor and ejector, Extractor Spring, SBN, and is MPI (Magnetic Particle Inspected).


Bushmaster Firearms™ Bolt Carrier group:

-5.56 Caliber

-M16-cut carrier

-Properly staked gas key

-Shot Peened

-Bushmaster Logo

-MPI Tested 

-Salt Bath Nitride Finish

-Machined 8620 Tool Steel & 9310 Steel 

-Made in America



⚠️WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to - https://www.P65Warnings.ca.gov 

Customers Also Viewed


Description: The M4 Patrolman's™ rifle series is the core of the Bushmaster® Firearms line…

QRC™ Barrel

-QRC™ Replacement Barrel with Gas Block.  -1:8 Twist Rate -16 inches - Salt bath nitride …