The Lewis Machine and Tool AR-15 bolt carrier group is a full-auto rated, M16 cut BCG designed for long-term durability and reliability. The manganese phosphate carrier is machined out of 8620 Carpenter steel and has been magnetic particle inspected to ensure the dimensions are Mil-Spec or greater. The bolt is machined from 158 Carpenter steel and features an extremely durable Manganese Phosphate finish. The bolt has also been high-pressure tested to ensure that it has been appropriately hardened without being brittle. The gas key has been properly staked to prevent the hardened screws from backing out over time, and the heavier weight of the M16 profile helps to prevent bolt bounce during rapid fire. This LMT 5.56 bolt carrier group is the perfect addition to your next “bomb-proof” AR-15 build.
Lewis Machine and Tool is dedicated to providing citizens the same quality products that have been serving law enforcement and the military for years. This AR BCG is just one of the many products they make designed to last. Build an LMT AR-15 if you want a rifle that won’t fail.