Our proprietary steel alloy ALPHA Scope Mounts are machined with an exactness that is both strong yet ductile that allows our rings to form around a riflescope, yet will not damage scope under proper installation. The steel rings are epoxy powder coated to prevent oxidation and resist gun oils, cleaning solutions and outdoor exposure. Model Alpha MSR Pieces 1 Series Scope Mount/Ring Combo Material Aluminum Mount Type 1913 Picatinny Rail Mount Height 1.535" Rings Included Yes