Präzise gefertigter Piston aus Aluminum. Dank dem extra dicken O-Ring dichtet der Piston Head ausgezeichnet ab. Ein weiteres nettes Feature ist der ebenfalls aus Aluminium gefertigte Kugellagerhalter. Bei normalen Piston Heads besteht dieses Teil aus Kunststoff und kann auseinanderbrechen, Union Fire hat diese Schwachstelle aber erkennt und souverän entschärft.
The silent piston head is made of duralumin EN AW 6012 T6 on the CNC machining centre. Nine holes are drilled on the front side.The air stream flows through these holes during compression thus expanding the O-ring which provides for better sealing of the space between the piston head and the cylinder.
The silent piston head is equipped with a pneumatic brake. The brake stops the air flow before the piston head hits the cylinder head. Closing the air flow creates an air cushion that ensures a damped impact of the piston head. This will significantly reduce noise and reduce the dynamic shocks transmitted to the gearbox.
Installation of the silent piston head requires expertise in the function of airsoft guns. Especially the AoE (Angle of Engagement) must be set correctly. This means that the AoE must be done with compressed air brake and 0.5 - 1 mm clearance between cylinder head and piston head.
Silent piston head can be combined with "Silent cylinder head" or "Cylinder head - CLASSIC".
For long life, we recommend using only for the following applications:
DMR - Spring force up to M150, semi-auto shooting only
DMR - Spring force up to M140, semi-auto or full-auto shooting with cadence up to 8 bb / s.
Spring force up to M120, semi-auto shooting, or full-auto with cadence up to 15 bb / s.
The silent piston head is not suitable for weapons with high cadence.
Axial ball bearing for easy spring rotation
Plastic nut that reduces total weight
Aluminium New Bore-up piston head (unlike plastic) for maximum durability. 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 .
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.
This is NBU (New Bore Up) version and can be used only with the proper larger cylinder!