The Gemtech MM9 LID in 1/2×28 (Gemtech part no. 12177) is a Linear Inertial Decoupler built specifically for use with the GM-9 and MULTIMOUNT suppressor line. It is required hardware for any handgun that runs a Browning-type tilting-barrel action, including most Glock, SIG, and HK pistols, because it lets the pistol properly cycle once the added weight of a suppressor is hanging off the end of the barrel. Without a decoupler like this, the extra mass on the muzzle can cause the slide to short-stroke or fail to cycle reliably.

Key Specifications

• Functions as a Linear Inertial Decoupler (LID) for use with Gemtech GM-9 and MULTIMOUNT suppressors.
• Required for handguns with a Browning-type tilting-barrel action, including most Glock, SIG, and HK pistols.
• Allows the pistol to properly cycle once suppressor weight is added to the muzzle.
• Threaded to 1/2×28 for direct mounting.
• Classified as a silencer accessory rather than a suppressor itself.
• Part of Gemtech’s LID product line.
• Weighs approximately 0.25 pounds.

Frequently Asked Questions

Do I need this to run a GM-9 suppressor on a Glock? Yes, any handgun with a Browning-type tilting-barrel action, which includes most Glock, SIG, and HK models, needs the LID to cycle properly with a suppressor attached.

Is the LID itself an NFA item? No, it is a mass-buffering accessory used with a suppressor, not a suppressor itself, so it is an ordinary Title I accessory.

Buy the Gemtech MM9 LID, 1/2×28

Keep your pistol cycling reliably with a Class 3 accessory from Gemtech. Order it from our Lubbock, Texas gun shop for fast, reliable shipping.