The Gemtech GM-9MM Tundra Piston Lid is a threaded replacement piston designed for use with the GM-9, Multimount 9, and Tundra lids. It is specified for 9 mm caliber and uses a left-hand thread pattern of 13.5x1mm. The piston installs in the field without tools and is listed as full-auto rated in the manufacturer description. This listing is for the threaded piston only.
Key Specifications
- The piston is specified for the 9 mm caliber.
- The thread pattern is 13.5x1mm LH.
- Compatible with GM-9, Multimount 9, and Tundra lids.
- Fits firearm family: Sig Sauer MPX.
- Install method is field-installable without tools.
- This listing includes the threaded piston only.
- Manufacturer rating: Full Auto Rated.
- The listed weight is 0.1.
- The listed shipping weight is 0.1.
- Package dimensions are listed as 5.9 x 4.0 x 1.2.
This piston provides a direct, serviceable replacement option for users maintaining compatible Gemtech lids. Its tool-free installation and threaded interface allow straightforward field service and parts replacement while retaining the functional characteristics noted by the manufacturer.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.



