07/25/2024
MicroBest BCG 556 Chrome C158 MPI+Sprinco+Oring $102 + ship
MicroBest BCG 556 Chrome C158 MPI - 4518802 (MicroBest). Bolt Carrier: Heavy Duty M16 design 8620 steel heat treated Gas Key Material - 4140 heat treated Grade 8 Gas Key Screws, Staked Chrome lined gas key and carrier interior Hard Chrom