AAC PISTON ILLUSION 9 13.5X1LH – Replacement Piston for Illusion 9 Suppressor

The AAC Piston Illusion 9 13.5X1LH is a replacement piston designed specifically for the Advanced Armament Illusion 9 suppressor. This Nielsen device (booster assembly piston) ensures reliable cycling in tilting-barrel pistols by allowing the barrel to recoil independently while the suppressor remains stationary during operation. The 13.5x1 left-hand thread pitch is a European standard found on select pistol models.

Machined from heat-treated steel, this piston threads directly onto compatible barrels and mates with the Illusion 9 booster housing. Replacement pistons are essential for adapting suppressors to firearms with different thread pitches or replacing worn components. AAC pistons are serialized components—confirm compatibility with your suppressor model before ordering.

• Type: Nielsen Device Piston
• Compatible Suppressor: AAC Illusion 9
• Thread Pitch: 13.5x1 LH (Left-Hand)
• Material: Heat-Treated Steel
• Use: Replacement piston for European-threaded pistol barrels