AR-15 Nitride Skeletonized Low Mass Bolt Carrier Group (Tin Coated)

Description

This AR-15 Nitride Skeletonized Low Mass Bolt Carrier Group is engineered for builders seeking reduced reciprocating mass without sacrificing structural integrity. Constructed from 8620 Steel for the bolt carrier and utilizing a 9310 steel bolt, this unit undergoes Magnetic Particle Inspection (MPI) to ensure material integrity under high-stress cycling. The skeletonized profile removes excess material, resulting in a lightweight assembly that weighs 8.6 Oz, which can contribute to a faster cyclic rate depending on the rest of the build configuration. The surface treatment combines a Nitride base with a Tin Coated (Gold Titanium Nitride Finish) to enhance corrosion resistance and reduce friction during operation. Grade 8 screws are used to secure the gas key, which is hydraulically staked to Mil-spec standards, ensuring the key remains fixed under repeated firing. The unit is designed to be compatible with standard dust covers and is manufactured in the USA. This bolt carrier group is heat-treated for durability and comes with a 1 Year Warranty. It is intended for use in standard AR-15 platform builds where reduced weight is a priority.