The BT47-NC PSR (Precision Sniper Rifle) Atlas Bipod “No Clamp” model has a two hole pattern of 1.100” with the holes being 10/32 threads. It requires any 17S size lever style mount such as the ADM-170-S, ARMS 17S, LT271 or any ARCA dovetail mount with the same hole pattern. *See below for mount compatibility specifications. The BT47-NC will also mount directly to our BT19 AI Spigot or BT70 M-LOK® Adapter. 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. Includes two 10-32 x 3/8″ flathead socket screws. Available in black only. The PSR series of Atlas Bipods were developed for the SOCOM PSR (Precision Sniper Rifle) Weapons System (BT46-LW17 was selected for SOCOM PSR).