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AirsoftParts TECAFORM piston head is a lightweight CNC-machined piston head made from TECAFORM (POM) engineering plastic, weighing just 9.3 g. Nine holes on the front use air pressure to expand the sealing O-ring for an effective seal inside the cylinder. It also features an axial ball bearing that allows the spring to rotate more freely during compression.

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ASPARTS017
AirsoftParts CLASSIC cylinder head is a CNC-machined head made from EN AW 6012 T6 duralumin for V2 and V3 gearboxes. Two O-rings provide reliable sealing inside the cylinder, while the shaped 70 ShA impact pad cushions piston impacts. The electroless nickel-plated finish provides high hardness, wear resistance and low friction for smooth nozzle movement.
ASPARTS021
AirsoftParts ported cylinder is a stainless steel cylinder for AEGs with an inner barrel length of 200–400 mm, such as M4 or MP5. Gen 1.2 features revised dimensions for better compatibility and a smoother inner surface. The cylinder has an inner diameter of 23.95 mm, a ground finish and cooling grooves around the outer circumference.
AirsoftParts TECAFORM piston head is a CNC-machined component for AEG air seal systems, made from TECAFORM (POM) engineering plastic. The combination of material and lightweight design results in a weight of just 9.3 g, reducing the moving mass of the piston assembly and therefore the mechanical stress generated on impact. Due to its low weight, the manufacturer also recommends it for V2 gearboxes. The front features 9 holes through which air flows beneath the sealing O-ring during compression. The pressure expands it towards the cylinder wall and helps provide an effective seal for the piston assembly. The piston head also features an axial ball bearing that allows the spring to rotate more freely during compression, reducing torsional stress and contributing to longer spring life. In a comparison with a standard air seal system and an M120 spring, the manufacturer measured an approximate muzzle velocity increase of 5 m/s. However, this is not a guaranteed increase, as the final performance depends on the complete configuration and air seal of the specific gun.
The lightweight TECAFORM construction weighs just 9.3 g, reducing the moving mass of the piston assembly and mechanical stress on the gearbox during the operating cycle.
Air flowing through the 9 holes on the front expands the sealing O-ring against the cylinder wall, helping to provide an effective seal during compression.
The piston head is precision CNC-machined from TECAFORM engineering plastic, also known as POM, combining low weight with the durability required for a piston assembly.
The integrated axial ball bearing allows the spring to rotate more freely during compression, reducing unwanted twisting and contributing to longer spring life.
The manufacturer states compatibility with all types of gearboxes and, due to its low weight, also recommends this piston head for builds with V2 gearboxes.
The weight of just 9.3 g reduces the moving mass of the piston assembly. The spring therefore accelerates a lighter assembly, and less energy is generated on impact than with a heavier solution, which can be beneficial particularly in mechanically stressed builds.
During compression, air flows through the holes beneath the sealing O-ring and expands it towards the cylinder wall. This helps provide proper piston sealing during the operating cycle.
The +5 m/s figure is only an approximate result of the manufacturer's test, in which the piston head was compared with a standard air seal system using an M120 spring. It cannot be considered a guaranteed increase, as the resulting muzzle velocity depends on the complete configuration of the gun.
The bearing allows the spring to rotate more easily during compression, thereby reducing torsional stress. According to the manufacturer, this solution contributes to extending the service life of the spring.
| Variants | TECAFORM |
| Piston head | Plastic |