Shop › DBB BBL 308 WIN 16" MID LENGTH BLK DBB BBL 308 WIN 16" MID LENGTH BLK $119.00 Diamondback Firearms Barrel 308 Winchester, 16", 1:10 Twist, Black Nitride Finish, Mid Length Gas System, Threaded 5/8-24", Fits AR Rifles 308M16L50B10R Quantity: Add To Cart Added! Diamondback Firearms Barrel 308 Winchester, 16", 1:10 Twist, Black Nitride Finish, Mid Length Gas System, Threaded 5/8-24", Fits AR Rifles 308M16L50B10R