The MEGA GTR-3S Ambidextrous Billet AR-15 Lower Receiver comes stripped and ready for your next custom AR build. ZEV starts with high-quality 7075 T6 aluminum billets and final machines them to better than mil-spec dimensions held to .001 tolerances, giving you maximum compatibility with mil-spec and aftermarket parts and accessories. The MEGA GTR-3S Billet AR-15 Lower Receiver offers superb strength and versatility for building an AR-15 configured exactly the way you want it. Technical Specs Machined from American-made 7075-T651 billet aluminum True black Type III Class 2 hard coat anodize Nylon typed tension screw for adjusting fitment to various uppers Ambidextrous bolt release All proprietary components are included Shipping Information NOTE: Item cannot be shipped to Washington, Illinois