The ZEV Technologies Forged AR-15 Lower Receiver comes stripped and ready for your next custom AR build. ZEV starts with high-quality 7075 T6 aluminum forgings and final machines them to better than mil-spec dimensions held to A .001" tolerances, giving you maximum compatibility with mil-spec and aftermarket parts and accessories. The ZEV Technologies Forged AR-15 Lower Receiver offers superb strength and versatility for building an AR-15 configured exactly the way you want it. FeaturesMachined from Forged American Made 7075-T651 aluminumMachined with BETTER that Mil-Spec requirements, with critical tooling dimensions held within +/- .001"True Black Class 2 Type 3 Hard coat anodizeFeatures the original "GATOR GRIP" texture on the front of the mag strap for added gripGenerous flare cut to the magazine well for quick magazine changesNylon tipped tension screw for adjusting fitment to various uppers