Mdt Sporting Goods Inc 105524BLK XRS Chassis Black Aluminum Core with Polymer Panels, Adj. Cheekrest, M-LOK Forend, Interchangeable Grips, Fits Tikka T1XThe XRS Chassis is designed for shooters that want the fit and feel of a traditional shaped rifle stock with the benefits of a modern precision rifle chassis system. Each XRS Chassis is constructed from a full length CNC machined core of 6061 aircraft grade aluminum wearing high strength textured polymer panels for insulation from the elements. The precision aluminum V block bedding system ensures fit and function to maximize the accuracy of any rifle