Magpul Industries QR Rail Grabber, Developed Primarily For Magpul Bipods, True Quick-Release Plate That is Compatible With a Wide Variety of Products That Use The A.R.M.S. 17S Style Footprint, Compatible With Both Picatinny and RRS/ARCA Interfaces, Aluminum, Black MAG1196-BLK The Magpul QR Rail Grabber provides a compact" user-adjustable" true quick-release plate that's compatible with a wide variety of products that use the A.R.M.S (R) 17S style footprint. Developed primarily for the Magpul Bipods" the Bipod QR Adapter can be used with either Picatinny or RRS/ARCA interfaces. With its user-adjustable dual clamping mechanism" the QR Rail Grabber slims down to the rail it sits on" ensuring a clean" compact" and unobtrusive fit. A knurled knob makes for easy manipulation and sits close to the body of the adapter and out of the way. Machined from Mil-Spec aluminum" it's extremely rugged and provides a stable platform for hard-use application.