BRT M4A1 Bolt Assembly Kit C158 HPT/MPI
Product Details
Replacement Bolt Assembly for the AR Family of Weapons (AR15, M16, M4)
Carpenter 158 bolt is Shot Peened, HP tested and MP inspected.
Bolt is marked "MP".
Includes cam pin with dry film lubricant, CHROME Firing pin and Firing Pin Retaining Pin.
100% made in USA to current USGI M4A1 specifications.
