The Really Right Stuff SOAR BTC-Pro system is based on both the Nato Picatinny Standard and the Really Right Stuff 1.5" Dovetail Standard. A screw knob style clamp designed to directly thread onto the No Clamp versions of A.R.M.S. 17S compatible Thunderbeast, B&T Atlas and Magpul bipods. You will now be able to mount anywhere along your rifles standard picatinny rail, RRS SOAR custom chassis mount, multi-purpose rail, or full length chassis RRS/Arca rail. Clamp jaws open and close by twisting the knurled knob on the tried and true screw-knob clamps. FeaturesDual combination jaw, Picatinny/RRS 1.5" dovetail standard CNC machined 6061 T6 AluminumBipod compatibility; A.R.M.S-17s Compatible Bipods - Thunderbeast, Atlas BT10 V8 /BT46-47 PSR/BT65 Cal, and Magpul bipods Improved screw knob, beveled for more leverage