Rock River Arms LAR-PDSM
One of a new generation of firearms employing RRA's patent-pending Piston Driven System (PDS). With purpose-designed bolt carrier, adjustable gas piston and over-the-barrel spring and guide rod arrangement, the RRA Piston Driven System is able to completely do away with the traditional recoil system associated with AR-style firearms, making for an extremely versatile weapon platform.
