The SilencerCo AC626 Piston is an M13.5x1 LH XL suppressor piston for compatible SilencerCo pistol suppressor setups. The XL length is intended for firearms where the silencer requires additional clearance between the threaded barrel and the suppressor.
SilencerCo pistons are designed to be changed out for different host firearms, calibers, and barrel thread patterns. This AC626 piston uses M13.5x1 left-hand metric threads, a common European-style pistol thread pattern used on select threaded pistol barrels.
XL Length for Extra Clearance: SilencerCo notes that XL pistons are for firearms where additional length is required between the threaded barrel and the silencer. This can matter on certain hosts where standard-length pistons do not provide the needed clearance.
Booster / Nielsen Device Component: A piston is part of the booster assembly that allows many semi-automatic tilting-barrel pistols to cycle properly with the added weight of a suppressor. For fixed-barrel hosts, use the appropriate fixed-barrel spacer or fixed-mount configuration recommended by SilencerCo.
Durable Construction: SilencerCo pistons are commonly listed as heat-treated 17-4 stainless steel, giving the part durability for repeated suppressor mounting and cycling use.
Important Fitment Note: This AC626 model is the M13.5x1 LH XL piston. Always confirm your barrel thread pitch, left-hand thread direction, piston length requirement, suppressor compatibility, host action type, and bore alignment before installation or live fire.
Related Gear: Browse more SilencerCo products, shop additional silencer accessories and suppressor mounts, or pair your compatible host with 9mm Ammo.