The RSR is an M-Lok compatible rail that is designed to be inletted into a tradition rifle stock. Once installed It allows you to mount accessories such as bipods, tri-pods adapters, barricade stops where you want them. The RSR now allows you to have the handling characteristics of a traditional stock with the mounting ability of a chassis. When paired with the HP 1.5in dovetail rail which is Arca Swiss and Really Right Stuff compatible it creates a platform for mounting multiple accessories at one time.  All rails are bead blasted mil-spec type III hard anodized.  Mounting hardware and instruction are included.