5.56/223/300BLK, M16 MIL-SPEC BOLT CARRIER GROUP

M16 bolt carrier groups is durable, reliable, and made from the highest quality mil-spec components.
 
Features:
M16 profile 5.56/223/300BLK
9310 Bolt w/ Billet Extractor
MPI’d
Shot Peened
Mil-Spec Tool Steel Extractor w/ Crane (NAVSPECWAR) o-ring & spring
Mil-Spec Staking on the Key
Nitrided throughout assembly, including carrier and key
Made in USA