Modify Aluminum Piston Head with Bearings Works with any standard AEG gearbox. Made of Aircraft aluminum alloy. Made with revolutionary design to be more effective and 100% airtight. It's for Modify/ Systema series Bore-Up Cylinder.

The Bored-up Airsoft Piston Head is compatible with larger cylinders to achieve higher displaced air volume, with rubber bumper to reduce sound and impact.l

Specifications:

• Made of aircraft aluminum alloy.
• Electroplated finish & improved hardness
• Piston heads in airsoft guns push out air via its travel from cylinder to air nozzle.
• Includes Thrust Bearing For Increased Power and Speed