The Q AR-15 Two-Piece Bolt Carrier Group is a stainless steel, nitride-coated BCG for standard AR-15 pattern rifles. Q builds it to mil-spec, and the two-piece design lets them control critical features at the front end of the carrier more closely during manufacturing.
The bolt carrier group is the heart of an AR-15: it strips and chambers each round, locks the bolt, extracts and ejects. A quality BCG with a hard nitride finish resists corrosion and wear and is easier to wipe clean after a range day. This is a drop-in replacement for a worn factory BCG, or a solid starting point for a new build.
Features:
Fit check: this BCG is for standard AR-15 pattern rifles. It is not for AR-10 / .308 rifles or pistol-caliber ARs.
Have the headspace checked with gauges whenever you pair a new bolt with a barrel. Lubricate the carrier before the first range trip, and check function with a few single-loaded rounds before you run full magazines.
