NBU POM silent piston head

New Bore Up silent piston head. 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 the rubber and it is not suitable for standard flat cylinder heads. Optimal is to use funnel cylinder head, which is also in our offer. Both parts fits and provides the best choice for your air-seal upgrade. Body made of POM (Polyacetal)  Axial bearing provide smooth rotation of the compressed spring and aluminium washer provide great durability and cannot crack as a plastic one.  Package include piston head, O-ring, aluminium washer, screw and axial bearing.  Weight: 11,9g