Expo Arms 5.56 NATO Complete MIL-SPEC M16 / AR-15 Bolt Carrier Group - Phosphate

The Expo Arms Bolt Carrier Group is a great choice for any build. This drop-in AR-15 BCG features a tough manganese phosphate 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. and covered by a lifetime warranty, you can count on this BCG for a lifetime of service.

Features:
.233/5.56 NATO
Hard chromed bore and gas key
Manganese Phosphate 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
MIL-SPEC O-ring
MIL-SPEC gas rings
4140 steel cam pin
8740 steel firing pin with hard chrome finish
Magnetic particle inspected
Lifetime warranty
Proudly made in the U.S.A.