PSA 8.5" Pistol-length 5.56 NATO 1/7 Nitride 7" Lightweight M-Lok Upper with BCG & CH - 5165450466

Overview

This PSA upper features an 8.5-inch 5.56 NATO barrel with a 1:7 twist rate, M4 barrel extension, and a pistol-length gas system. The nitride-finished barrel is outfitted with a PSA 7-inch lightweight M-LOK free-float rail, a 0.750-inch low-profile gas block, and an A2 flash hider. The forged 7075-T6 A3 AR upper receiver is hard-coat anodized in black to military specifications. The bolt assembly is constructed from mil-spec shot-peened Carpenter 158 steel with a grade-8 staked gas key, housed in a bolt carrier that is parkerized on the outside and chrome-lined on the inside.

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