The Gemtech Lunar 9 and GM-9 Thread Mount in 1/2×28 (Gemtech part no. 12172) is the threaded endcap adapter for Gemtech’s 9mm suppressor line. Gemtech designs it for use on GM-9 and Multimount suppressors when they ride on fixed-barrel carbines and submachine guns. The 1/2×28 pitch is the common muzzle thread on 9mm carbines and PCC barrels, so it covers a large share of hosts. Pistol shooters should note that Gemtech points most handguns toward its LID mount instead, since a fixed mount does not let a tilting barrel cycle.

Key Specifications

• The thread is 1/2×28, the muzzle thread most 9mm carbines and pistol-caliber carbine barrels are cut for.
• It is the Lunar 9 and GM-9 thread mount, matched to the rear of those suppressors.
• It is a threaded endcap adapter, which replaces a quick-detach interface with a direct thread attachment.
• Intended hosts are fixed-barrel carbines and SMGs, where the barrel does not need to move for the action to cycle.

Frequently Asked Questions

Which suppressors does the 1/2×28 mount fit? Gemtech lists it for the Lunar 9 and GM-9, and for Multimount suppressors, as the threaded endcap adapter.

Can I use it on a handgun? Gemtech notes that most handguns require its LID mount for proper function, so this fixed mount is aimed at fixed-barrel carbines and SMGs.

Is there a different thread version? Yes. Gemtech offers this mount in other pitches, so confirm that your barrel is threaded 1/2×28 before ordering.

Buy the Gemtech Lunar 9 and GM-9 Thread Mount, 1/2×28

A mount is only useful if it matches the barrel, and this one is built for fixed-barrel 9mm hosts with a 1/2×28 muzzle. We ship it direct from our Lubbock, Texas shop. Find more mounts and adapters in our Class 3 parts and accessories.