The Henderson Precision Universal 1.5 Dovetail Arca Swiss rail is light but extremely rigid. It's both Arca Swiss and RRS compatible. It's designed with a center mounting slot to fit a wide variety of chassis and conventional stocks. The Universal rail has a very low and sleek appearance that allows the end user to mount the rail flush with the bottom of the stock or push it forward to extend the forend. It will work with any Arca Swiss quick release or thumb screw clamp. All rails are bead blasted mil-spec type III hard anodized. The Universal rail paired with our proprietary MLOK nuts allows the end user to mount the rail to anything MLOK. The Universal rail will mount directly to your AR handguard or chassis even if the MLOK slot spacing is not true MLOK spacing.