Features: Made From Solid Billet 6061 T6 Aluminum. Type II, Class III Hard Coat Anodized, Matte Black Finish. Ergonomic Custom Steel Screw & Steel Locking Bar, Black Oxide Finished Bulid-In Recoil Lugs, For Return To Zero Capability Lightweight. Fully Adjustable To Fit Weaver & MIL-STD-1913 Dovetails. True Co-Witness For Perfect Alignment w/ All Fixed Iron Sights & Aftermarket Flip-Up Sights. Unique Spring Assisted Quick Attach / Detach Mounting System. Unlimited Lifetime Warranty 100% US Made