The SilencerCo AC26 Piston (M13.5x1 LH) is the correct interface for mounting compatible SilencerCo suppressors to pistols utilizing the European-standard left-hand metric thread pattern—most notably HK VP9 Tactical and similar platforms. This piston is a critical component of the suppressor’s recoil booster system, allowing reliable cycling on tilting-barrel handguns.

Designed as the standard-length configuration, the AC26 is the correct starting point for most pistol suppressor setups. It ensures proper alignment, secure engagement, and consistent function when paired with SilencerCo suppressors utilizing the Alpha-pattern piston system.

Manufactured from heat-treated stainless steel and built to withstand the stresses of repeated firing cycles, the AC26 delivers long-term durability while maintaining precise thread engagement. Installation is straightforward and allows the suppressor to function as intended—absorbing recoil energy while preventing undue stress on the host firearm.

For users running HK pistols or other M13.5x1 LH hosts, this is not an accessory—it is a required component for proper suppressor operation.

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