GEMTECH GM-45 Rear Piston Lid M16 12190

Gemtech Piston for GM-45, Lunar-45 and Blackside-45 LID (M16x1mm RH) Caliber Sound Reduction Diameter Length Weight Mount Material Full Auto Rated Finish Thread size M16x1mm RH Can also use on 40 caliber and 9mm pistols. All options can be installed in the field without the use of tools.