A precise enhanced two-stage trigger adds significantly to the accuracy of the MR556A1. The retractable buttstock can be locked into a solid, non-moving position by tightening an Allen screw in the bottom of the stock. Special target rifle takedown pins ensure the upper and lower receivers are firml..
SFI-15 COMPOSITE LOWER RECEIVERADVANCED MATERIALS AND COMPONENT DESIGNThe proprietary lightweight nano-composite construction of the SFI-15 lower receiver provides a superior strength to weight ratio. Our nano-composite material also processes the kinetic energy created by the firing process in a mu..