Gemtech GM-9 Multimount Piston Core – M13.5x1mm LH
Not Yet Rated | Write the First Review SKU: 222-GEM-12171
UPC: 609729000000
MFG#: 12171

Gemtech GM-9 Multimount Piston Core – M13.5x1mm LH

The Gemtech GM-9 Multimount Piston Core (M13.5x1mm LH) gives you the flexibility to run your suppressor on a wider range of host firearms. Designed for the GM-9, Multimount, or TUNDRA LID systems, this piston core makes swapping between thread pitches simple and tool-free. If you’ve ever wanted one suppressor to work across multiple platforms, this is the part that makes it happen.

Precision-machined for reliability and longevity, the piston core is built to maintain proper alignment and reduce wear while keeping your setup modular. Its left-hand M13.5x1mm threading ensures compatibility with many European-pattern 9mm handguns, including models from Heckler & Koch and SIG Sauer.

Why Choose the GM-9 Multimount Piston M13.5x1mm LH?

• Expanded Compatibility – Use your GM-9 suppressor with pistols threaded M13.5x1mm LH, including popular HK and SIG models.

• Quick Swap – Change thread pitches in seconds without extra tools.

• Durability – Engineered for repeated use while maintaining tight tolerances.

• Versatility – A single suppressor can now support multiple firearms with different threads.

Specifications

• Model: GM-9 Multimount / TUNDRA LID piston core

• Thread Pitch: M13.5x1mm LH (left-hand)

• Finish: Black, precision-machined

• Compatibility: GM-9, Multimount 9, TUNDRA LID suppressor systems

Perfect for Suppressor Owners Who Want Options

If you already own a GM-9 or Multimount suppressor, this piston core is one of the simplest upgrades you can make. It saves you from needing multiple dedicated suppressors and gives you the ability to move between platforms—whether it’s a PCC, a full-size handgun, or a European-pattern pistol.

FAQ

What is the purpose of this piston core?
It allows you to use your Gemtech GM-9, Multimount, or TUNDRA LID suppressor on barrels threaded M13.5x1mm LH, commonly found on European 9mm pistols.

Which firearms are compatible?
This piston works with any fixed or tilting-barrel pistol threaded M13.5x1mm LH. Popular examples include HK USP 9mm Tactical, SIG Sauer P226 Tactical, and similar platforms.

Can I install it without tools?
Yes. The piston core is designed for quick, tool-free installation and removal.

How is this different from other GM-9 pistons?
Other pistons are cut for thread pitches like 1/2x28 or 1/2x36. This specific core is cut for M13.5x1mm LH, making it essential if your pistol uses that threading.