Microbest

Microbest C158 HPT/MPI 5.56 Bolt Carrier Group – Chrome The Microbest Bolt Carrier Group is an excellent choice for any build. This drop-in AR-15 BCG features a corrosion-resistant hard chrome finish, MIL-SPEC dimensions, and a magnetic particle inspected Carpenter 158 steel bolt. Crafted from domestically sourced 8620 steel, the M16 cut carrier features a gas key secured by properly staked Grade 8 screws and made in the U.S.A. Features .233/5.56 NATO Hard chrome finish M16 cut Aircraft quality 8620 steel carrier 4130 steel gas key Properly staked grade 8 gas key screws

Microbest C158 HPT/MPI 5.56 Bolt Carrier Group – Chrome The Microbest Bolt Carrier Group is an excellent choice for any build. This drop-in AR-15 BCG features a corrosion-resistant hard chrome finish, MIL-SPEC dimensions, and a magnetic particle inspected Carpenter 158 steel bolt. Crafted from domestically sourced 8620 steel, the M16 cut carrier features a gas key secured by properly staked Grade 8 screws and made in the U.S.A. Features .233/5.56 NATO Hard chrome finish M16 cut Aircraft quality 8620 steel carrier 4130 steel gas key Properly staked grade 8 gas key screws

The Microbest Bolt Carrier Group is a great choice for any build. This drop-in AR-15 BCG features a corrosion resistant hard chrome finish, MIL-SPEC dimensions, and a magnetic particle inspected carpenter 158 steel bolt. Crafted from domestically sourced 8620 steel, the M16 cut carrier includes a gas key fastened by properly staked grade 8 screws. Made in the U.S.A. Features: - .233/5.56 NATO - Hard chrome finish - M16 cut - Aircraft quality 8620 steel carrier - 4130 steel gas key - Properly staked grade 8 gas key screws - Carpenter 158 steel bolt - 4140 steel extractor

The Microbest BCG has been designed from the ground up with the most avid shooters in mind, using only the best materials available on the market today. The bolt assembly is machined from Carpenter No. 158® steel, shot-peened, MP marked, HP tested, and has a tool steel extractor that is machined from bar stock.