ruger 10 22 barrel shroud ventilated ruger 10 22 barrel shroud ventilated ruger 10 22 barrel shroud ventilated ruger 10 22 barrel shroud ventilated vented barrel shroud non threaded ruger 10 22 barrel shroud tacticool22 vented barrel shroud non threaded ruger 10 22 barrel shroud tacticool22 rugger sr 22 1 2 x 28 barrel shroud rugger sr 22 1 2 x 28 barrel shroud pike arms crown barrel shroud threaded