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 +/-0.001 inches 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. Features: Machined from forged American made 7075 T651 aluminum Machined with better that Mil-Spec requirements, with critical tooling dimensions held within +/- 0.001 inches True black Type III Class 2 hardcoat anodize The original gator grip texture on the front of the mag strap for added grip Generous flare cut to the magazine well for quick magazine changes Nylon tipped tension screw for adjusting fitment to various uppers