The PSR (Precision) Atlas Bipod came about as the Atlas was selected for the USSOCOM system. These changes include a non-rotational legs, fore and aft pivot limiting bosses and a 40% stronger Inner leg. SPECS: Height Range: 5–9" (6.56” at 90°). Preloaded Pan: 30 degrees. Preloaded Cant: 30 degrees. Position Button 0.5" diameter. Fore and Aft pivot limiting Bosses. 5 leg positions: 0, 45, 90, 135 & 180 degrees. Non-Rotating Legs: outer leg does not rotate around inner leg. Larger, stronger inner legs. Weight: 11.42 ounces approx. Footprint: 8–11". MORE INFORMATION: UHMW components used for smooth tracking. Preload on Pan and Cant can be tightened by means of the knurled knob. Picatinny Rail Mount interface by either standard machine screw fastener based clamp or optional ARMS 17S lever mount. Independent, intentional and non-orientated leg positioning allows either hand to move leg into any of the five leg positions. Solid leg positions allows shooter to load the bipod at the 45 and 90 degree positions. Non-orientated leg length adjustment done by either hand: Outer leg slides on the Inner leg locating on any of five positions 3/4" apart. Optional 3” Leg Extensions to increase height. Standard soft, durable Rubber feet that are suitable for many surfaces. Optional interchangeable Ski, Spike, Cleat and Spiked Cleat feet easily swapped in the field with the press of a stainless steel plunger with a bullet tip. Optional mounting systems available for Accuracy International.