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 but at a price point more in line with a conventional upper receiver and free-float handguard assembly.

The RRAGE Carbine builds on Rock River Arms' new extruded flat top upper receiver. Made of 6061T aluminum, this receiver exhibits the clean lines and defined angles commonly associated with more expensive billet uppers while delivering comparable strength and precision dimensions.