Shop › RRA CMPTL RRAGE 3G UPR 5.56NATO 16" RRA CMPTL RRAGE 3G UPR 5.56NATO 16" $540.00 Rock River Arms RRAGE 3G, Complete Upper Receiver, 223 Remington/556NATO, 16" Barrel, A2 Flash Hider, RRA 15" Free Float M-LOK Handdguard, Anodized Finish, Black, Fits AR-15, Includes Bolt Carrier Group and Charging Handle Assembly BB0470 Quantity: Add To Cart Added! Rock River Arms RRAGE 3G, Complete Upper Receiver, 223 Remington/556NATO, 16" Barrel, A2 Flash Hider, RRA 15" Free Float M-LOK Handdguard, Anodized Finish, Black, Fits AR-15, Includes Bolt Carrier Group and Charging Handle Assembly BB0470