This is a Rock River Arms AR known as the RRAGE chambered in 223 Remington, model DS1850.
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.
Features:
M-LOKâ„¢ Rail
Low-Profile Gas Block
A2 Flash Suppressor
6 Postion Stock