Description
21st Century Concentricity Gauge and Parts Type:Gauge with Wheel and Indicator Spika’s anti pry power point security Rear Rest EXMPSTD270010 Size:12.27 twist 6gr 32 inch keeps all components together Spika’s anti pry power point security system (#BT33) is installed with the Steel Bar Nut inside the free float tube and the 1913 Picatinny rail on the outside with the matching holes aligned