Technical Information

5.56x45mm NATO bolt assembly

Mil-Spec (M16-type) bolt carrier

This AR-Stoner AR-15 Bolt Carrier Group includes a complete 223 Remington / 5.56x45mm NATO bolt assembly, mil-spec (M16-type) bolt carrier, firing pin, cam pin, and properly staked gas key. The high quality bolt carrier is precision machined from ordnance-grade 8620 chrome moly steel, while the bolt is constructed of high strength 4130 steel. With the exception of the stainless steel firing pin, the entire bolt carrier assembly features a matte black manganese phosphate coating for superior corrosion resistance and durability. The supply of these AR-15 bolt carrier groups is very limited, so make sure to pick one up for your next rifle build or for use as a spare before it's too late!