The Talley Picatinny Base for Browning X-Bolt 20 MOA with Anti-Cant Indicator Short Action is machined from 7075 T-6 alloy and hard coat anodized to 65 Rockwell. This Talley picatinny base accepts any rings that will fit mil-spec 1913 Picatinny rails. It includes mounting hardware and T-15 Torx wrench. For Browning X-Bolt 20 MOA Anti-Cant Indicator Machined from 7075 T-6 alloy Anodized to 65 Rockwell Accepts any rings that will fit mil-spec 1913 Picatinny rails Includes mounting hardware and T-15 Torx wrench