The BT69-LW17 CAL Gen 2 Bipod mounts directly to any 1913 style Picatinny rail via the included ADM-170-S Lever. It is comprised of 6061-T6 aluminum, except the inner legs which are made from 7075-T6 aluminum, Mil-Spec Type III hard coat anodized and have heat treated stainless steel components. Available in black only. The CAL (Cant And Loc) Atlas Bipods were developed for shooters that do not desire the Panning feature.FeaturesPreloaded Cant: 63 degreesPosition Button 0.5a ^2 diameter5 leg positions: 0, 45, 90, 135 & 180AdegNon-Rotating Legs: outer leg does not rotate around inner leg