GEMTECH GM-45 Rear Piston Lid 9/1 12187

Gemtech Piston for GM-45, Lunar-45 and Blackside-45 LID (9/16-24) Caliber Sound Reduction Diameter Length Weight Mount Material Full Auto Rated Finish Thread size 9/16-24 Can also use on 40 caliber and 9mm pistols. All options can be installed in the field without the use of tools.