For several years, Atlas bipods have dominated the tactical bipod market. The PSR model is the latest offering from Atlas and makes several key improvements over prior models. Fore and Aft pivot limiting bosses and strengthened leg bosses allow the PSR to adapt quickly to any position. The new Non-rotating legs feature internal construction of T7075 aluminum for increased rigidity when building a position. The Atlas PSR is the finest tactical bipod on the market.FeaturesType III Hard AnodizedStainless steel springs & fasteners15 degrees +/- of preloaded PAN15 degrees +/- of preloaded CANTTooless Optional 3" leg extensions (not included)Tooless Optional Ski, Cleat and Spike feet (not included)Estimated range of elevation is 5-9" Standard5 Leg positionsNovel 45 degree Leg position pioneered by B&T Industries L.L.C.Heat Treated Stainless Steel Leg componentsBipod mounts directly to any 1913 style Picatinny rail via the included ADM-170-S lever