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:
From the same Collection
Aero Precision
Iron City Rifle Works
Aero Precision
LanTac USA
