Rock River Arms, the leader in specialized Modern Sporting Rifles, has developed a 5.56mm semi-auto that advances the clean, trim look and performance of the monolithic-style upper receiver/handguard design. The RRAGE 3G Carbine builds on Rock River Arms’ new extruded flat top upper receiver. Matched to the receiver is a 6061T aluminum free-float handguard that blends almost seamlessly with the upper to provide an elegant, unitized profile and balanced strength and rigidity across the optics platform. The 15″ handguard boasts a front and rear MS1913 top rail and features the popular M-LOK rail configuration for easy accessory adaptation. The M-LOK system along the side and bottom surfaces lets shooters run a clean handguard or add only the rail accessories needed to help maintain a sleek, snag-free signature.