Our proprietary aluminum alloy ALPHA Hunting Rings 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. – FEATURES: – Aluminum 1913 rail rings – Covered by SIG SAUER’s Infnite Guarantee