This Masterpiece Arms mount is designed to mount performance optics onto bolt action rifles with picatinny rails. This mount is machined from 6061 T6 aluminum and finished in T3 Mil-spec anodize. The interface ensures positive engagement for both in spec and out of spec rail systems. Absolute Return to Zero is possible through multiple locking lugs located on the bottom of the rail interface. Masterpiece Arms 35mm Tube 1.250"H 0MOA One-Piece Scope Mount ACC48