About the ROCK RIVER ARMS RUK-15

RUK-15 Features The Rock River RUK-15 pistol features a forged RRA LAR-15 lower receiver; forged A4 upper receiver; low profile gas block, RRA NSP flip-up front and rear sights and RRA lightweight aluminum free floating, 4.25″ pistol length, M-LOK compatible handguard. Includes Low Pro M-LOK compatible handstop and magazine. RUK-15 Specifications Caliber: 223 Rem Model: RUK-15 Stock Finish: Black Action: Semi-Auto Barrel Length Range: 4″ to 4.99″ Sights: Flip Up Front & Rear Capacity: 30+1 Muzzle: Vortex Flash Suppressor Grips: Black Hogue Rubber OAL: 22.25″ Receiver Finish: Black Receiver Material: Aluminum Stock Description: SB Tactical SBA3 Adjustable Arm Brace Stock Material: Synthetic Thread Pattern: 1 / 2″-28 tpi Trigger: Single-Stage Twist: 1:9″ Barrel Description: Chrome Moly Barrel Finish: Black Barrel Length: 4.50″