Arisaka Defense Rail Slider, Bipod Mount, ARMS 17S Pattern, Fits Picatinny, Anodized Finish, Black RS-BASE Make Picatinny Great Again with the Patent Pending Arisaka Rail Slider. It transforms the Picatinny rail on your rifle into a multi-position sliding mount with a push button recoil lug. A unique detented knob is used to set sliding tension" accounts for out-of-spec rails" allows the mount to be removed or installed without having to slide it off the end of the rail" and can be quickly and easily tightened down for maximum precision. The Rail Slider features the ARMS 17S pattern for compatibility with popular bipods like the Atlas PSR" Atlas CAL" MDT Cyke" and Magpul 17S Bipod. The Rail Slider is CNC machined from stainless steel and MIL-A-8625 Type III hard coat anodized 6061-T651 aluminum. Includes two 10-32 socket cap screws. Requires a 5/32 Allen wrench for installation (not included). Recommended torque: 30 inch lbs.