FailZero Full Auto Rated Lightweight AR-15 Bolt Carrier Group

FailZero takes mass out of the carrier without cutting it down to a skeleton, and this group comes in at 9.6 oz assembled. Less reciprocating weight means less disturbance to the sight picture shot to shot, which shows up most on a rifle running an adjustable gas block or a lighter buffer.

Every critical part carries FailZero's EXO nickel boron treatment, which is a dry lubricity coating rather than a plain finish. It runs on very little oil, wipes clean instead of needing a scrub, and holds up against wear and corrosion. The group arrives assembled and fits most mil spec AR-15 uppers in 5.56, 223, and 300 Blackout.