The Rival Arms R-22 Precision Chassis System takes your standard Ruger 10/22 style rimfire rifle and turns it into a serious precision plinking machine. CNC-machined from billet aluminum designed to accept most Ruger 10/22 receivers without any modification for a true drop-in fit. Standard AR-15 stock and pistol grip compatibility allows the user to customize the fit and feel of their rifle. It also is compatible with 1-3/16"-16 Mil-Spec Buffer Tubes. The integration of the M-LOK accessory mounting system brings versatility to the system that will take your favorite rimfire rifle to the next level.