The Atlas BT47-LW17 PSR (Precision Sniper Rifle) Atlas 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 strengthened inner legs which are made from 7075-T6 aluminum that are Mil-Spec Type III hard coat anodized and have heat treated, stainless steel components. The PSR series of Atlas Bipods were developed for the SOCOM PSR (Precision Sniper Rifle) Weapons System (BT46-LW17 was selected for SOCOM PSR). FeaturesType III Hard AnodizedStainless steel springs & fasteners30 degrees +/- of preloaded PAN30 degrees +/- of preloaded CANTPosition Button .5" diameterFore and Aft pivot limiting BossesEstimated range of elevation is 7-13" Standard5 Leg positions: 0, 45, 90, 135, and 180 degreesNon-rotating legs: outer leg does not rotate around inner legApproximately 15.13 ouncesFootprint of 10-14.5"