Spike's Tactical AR-15 Nickel Boron Coated Bolt Carrier Group

Upgrade your rifle with the Spike's Tactical® AR-15 Nickel Boron Coated Bolt Carrier Group. The Mil-Spec extractor is 8620 tool steel with a black extractor insert and Viton O-ring. The Mil-Spec gas key is also 8620 tool steel with Grade 8 hardware and a chrome interior. Plus, the gas key is properly staked. Firing pin is hard chrome finished and the cam pin features a Nickel Boron finish. This BCG features an 8620 tool steel Mil-Spec carrier designed for use with full-auto and a shot peened Mil-Spec bolt with 158 carpenter steel or 9310 steel construction (depending on supply) that's High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI). This BCG is a complete M-16 BCG and features a corrosion-resistant Nickel Boron coating inside and out (bolt, carrier, and gas key) with a laser-engraved Spike's Tactical spider logo. Backed by a lifetime warranty. Made in USA.