Gemtech GM-9/MM9 LID | 1/2-28 Threaded Piston

This item is a threaded piston core (LID piston) for use with Gemtech GM-9 and MM9 TUNDRA or MULTIMOUNT LID systems, providing the U.S. standard 1/2-28 thread. It installs in the field without tools and is intended to allow a suppressor-equipped pistol to cycle correctly when using Browning-type slide actions (Glock, Sig, HK, etc.). The listing is for the threaded piston only; LID body, spring and piston block are not included.

Typical applications include range and competition shooting where a suppressor-tailored mounting solution is required, and use with pistols or compatible semi-auto carbines that accept the specified thread pattern.

Product Specifications

• The UPC is 609728888954.
• The subcategory is listed as Suppressor Accessories.
• The model is shown as LID.
• The provided description/thread size is 1/2X28.
• The NFA thread pattern is 1/2×28.
• The product color is listed as Black.
• The product type is listed as Mount.
• The manufacturer guidance states it is required for Browning-type action handguns (Glock, Sig, HK, etc.).
• The item is specified as not compatible with TRINITY or VORTEX.
• The product can be disassembled is listed as False.
• The listed weight is 0.25 as provided in the manufacturer data.
• The package width is 3.9 as provided in the product attributes.
• The package length is 5.8 as provided in the product attributes.
• The package height is 1.6 as provided in the product attributes.
• An additional feature is listed as Multimount Adapter.

This threaded piston adapter lets you convert a TUNDRA or MULTIMOUNT LID to the common U.S. 1/2-28 thread quickly and without tools, simplifying host conversions and suppressor mounting for chronographed range work or competitive platforms. The component-focused design keeps the installation straightforward and minimizes parts on the host when swapping thread patterns.