PSA 20" Rifle-Length 6.5 Grendel 1/8 Stainless Steel 15" Lightweight M-Lok Upper - With BCG & CH - 5165448709

Overview

This PSA upper assembly features a 20-inch 416R stainless steel barrel chambered in 6.5 Grendel with a 1:8 twist rate, an M4 barrel extension, and a rifle-length gas system. The barrel is finished with a 15-inch lightweight M-Lok free-float rail, a .750 adjustable gas block, and an A2-style flash hider. The upper receiver is a forged 7075-T6 A3 unit that is hard-coat anodized to mil-spec standards. The included full-auto profile bolt carrier group features a 9310 steel bolt that has been shot-peened, with a gas key hardened to USGI specifications and staked per mil-spec requirements; the carrier is 8620 steel with a nitride finish.

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