A rock-solid mount! The rugged, 1-piece design is made of lightweight alloy and features a built-in 20 MOA slope. Designed specifically for Nikon M-308 riflescopes, but also works with AR platforms, Picatinny rails and Weaver style bases. Fits 1" tube scopes; Built-in 20 MOA slope; Lightweight alloy construction; Durable 1-piece design; Construction: Lightweight alloy; Fits: 1" tube riflescopes; Mfg. Number: 832; Nikon M-308 Scope Mount, 1", 20 MOA Slope