San Tan Tactical STT-15 Lite 6ARC, Semi-automatic, 6MM ARC, 18 Proof Research Carbon Fiber Barrel, Rifle Length Gas System, Black Finish, Magpul CTR Stock, Front/Rear Flip Sights, 30Rd, 1 Magazine STT-15 Lite 6ARC San Tan's innovative high-quality firearm systems and unparalleled performance in combination with Hornady's New 6ARC round take the AR15 platform to a whole new level!