Metal flat piston head with the bearing

Aluminium piston head (unlike plastic) for maximum durability. Low weight provides good rate of fire and shooting range. Eight air channels at the front of the head conduct compressed air under the O-ring. This air flow cause better o-ring sealing . Thrust bearing provides smooth rotation of the compressed spring and aluminium washer provide great durability and cannot crack as a plastic one. The second o-ring does not have a sealing function, but centers the head in the cylinder. No more scratching the cylinder surface. Package include piston head, O-ring, aluminium washer, screw and axial bearing.   Durable aluminum alloy 6061-T6 Weight only 11.9g (complete) Eight air channels Better sealing - increased range For all types of gearboxes Rubber guide ring