The Sig Sauer Suppressor Piston (brand part number SRD-PISTON-M135X1LH) converts an SRD9 or SRD45 suppressor to a 13.5x1mm left-hand thread pitch, letting owners match their suppressor to a different host barrel’s thread pattern. Machined from 17-4 heat-treated stainless steel and finished with a matte glass-bead texture, it’s a simple swap for the original piston already in the suppressor, and it’s a solid option for converting an SRD45 down to run on 9mm hosts.

Key Specifications

• Converts SRD9 or SRD45 suppressors to a 13.5x1mm left-hand thread pitch.
• Machined from 17-4 heat-treated stainless steel.
• Finished with a matte glass-bead texture.
• Simple piston swap, no suppressor disassembly beyond the piston itself.

Frequently Asked Questions

What suppressors does this fit? The Sig Sauer SRD9 and SRD45.

What thread pitch does it convert to? 13.5x1mm left-hand.

Buy the Sig Sauer Suppressor Piston, M13.5×1 Left-Hand

Match your suppressor to a new host barrel with a simple piston swap. Order it from our Sig Sauer lineup, part of our Class 3 parts and accessories selection, at our Lubbock, Texas gun shop for fast, direct shipping.