and Mil-Std 1913 rails via aluminum side clamp and bolt

Type: Rocket 19 tooth piston

Umarex / BCM Air and other VFC spec Gear boxes

Power lead is included with the valve and also available separately

△ Support green tracer and gel BBs

MECHBOX PRO CNC Aluminum Cylinder Head PDI and Mil-Std 1913 rails viaFeatures: Precision CNC Aluminum Construction Double O Ring for better air seal and reduced compression loss Polished stem for smooth cycling with nozzle while maintaining best air seal Built In rubber bumper for shock absorption from piston piston head Squared stem angle to ensure best air seal with air nozzle Compatibility: Most Gen 2 AEG Gearboxes Material: 6061T6 Aluminum Alloy