The Talley Picatinny Base for H-S Precision with 20 MOA & Anti-Cant Indicator (Short Action) is machined from 7075 T-6 alloy and hard coat anodized to 65 Rockwell. This picatinny base accepts any rings that will fit mil-spec 1913 Picatinny rails. It includes mounting hardware and T-15 Torx wrench.