The Gemtech Lunar 45 and GM-45 LID piston in 0.578×28 (Gemtech part no. 12185) is an extra piston core that sets a GM-45 or Lunar 45 up for standard American 0.578-28 threaded pistol barrels. Swapping pistons lets one .45 suppressor move between pistols with different thread patterns. Gemtech lists the standard 0.578-28 piston for 1911s, FN FNP-45, aftermarket Glock 21 barrels, S&W M&P45 pistols and others. It weighs 2.82 ounces.

Key Specifications

• The thread is 0.578×28, the standard American .45 pistol barrel thread.
• It is a LID piston core for the Lunar 45 and GM-45 suppressors.
• Gemtech lists it for 1911s, FN FNP-45, Glock 21 aftermarket and S&W M&P45 barrels, among others.
• Weight is 2.82 ounces.

Frequently Asked Questions

What does a LID piston do? An extra LID piston core lets you change threads on a GM-45 or Lunar 45 so one suppressor can be used on pistols with different thread patterns.

Which pistols does the 0.578×28 piston fit? Gemtech lists the standard 0.578-28 piston for 1911s, FN FNP-45, Glock 21 aftermarket barrels, S&W M&P45 and others.

Buy the Gemtech Lunar 45 and GM-45 LID Piston, 0.578×28

An extra piston core is a small purchase that gives a .45 suppressor more hosts to run on. Order it from our Lubbock, Texas gun shop for fast shipping, and browse more parts and accessories while you are here.