Low weight provides good rate of fire and shooting range. Six air channels at the front of the head conduct compressed air under the O-ring. This cause better sealing . Head is made of rubber and it is not suitable for standard flat cylinder heads. You should use a concave cylinder head, which is also available from us.
Axial bearing provide smooth rotation whilst the spring is compressed. The aluminium washer provides great durability and will not crack like a plastic one.
Package include piston head, O-ring, aluminium washer, screw and axial bearing.