Ball Bearing POM Piston Head for High ROF – FPS Softair

FPS Softair POM piston head with ball bearing, designed for high rate-of-fire AEGs and for making them quieter thanks to its very small striking surface. It is the lightest piston head FPS Softair makes for rifles firing more than 30 BBs per second, and it can be fitted with a metal bearing or with a technopolymer washer, both included.

Features and technical specifications

• Manufacturer: FPS Softair
• Manufacturer code: TPNS
• Type: ball bearing piston head for high rates of fire (High ROF)
• Body: POM
• Striking surface: reduced, conical and tapering towards the centre at several angles
• Seal: Viton sealing O-ring
• Weight: 8.3 g with metal bearing; 5.5 g with technopolymer washer
• Compatibility: Marui-compatible AEG gearboxes
• Origin: made in Italy
• Package contents: piston head, metal bearing, orange filled technopolymer washer

How it works

A lighter head reduces the moving mass of the piston and piston head assembly, with less mechanical stress and less noise on every cycle. The conical striking face prevents the cylinder head bumper pad from closing the vent holes, without leaving too much trapped air between the two heads: the anti-vacuum effect is ensured with no loss of power.

Bearing or washer

The metal bearing is the standard setup. For builds with extreme rates of fire, the FPS Softair technical team recommends the technopolymer washer, which reduces the moving mass even further.

In the field

This is the right piston head for High ROF builds for CQB and speedsoft, where a high rate of fire puts the piston assembly under heavy strain, and for anyone who wants a quieter replica in the woods. The design draws on the experience of Nico Saccocci of NikkSakk.Extreme.Airsoftcustom.