Description: ZEV CORE Rifles are intended for serious shooters and feature the high quality and aesthetics of ZEV rifle products with a combination of traditional mil-spec controls and functional upgrades that deliver excellent performance in the field or on the range. This upper receiver group can be installed on any standard AR15 lower receiver to either complete a build or upgrade an existing rifle. - ZEV forged upper receiver precision machined from 7075-T6 aluminum for strength and light weight finished in true black type III class 2 hard coat anodize. - ZEV 9 Wedge Lock hand guard provides a full length continuous top rail with M-LOK mounting system. The integrated anti-rotation pin ensures a consistently aligned and continuous top rail with the upper receiver. - AR Pistol 10.5 barrel chambered in 5.56 NATO with a 1:7 twist and carbine-length gas system and low profile fixed gas block. - 19 overall length.