FPS Arc 90 m/s AEG

The FPS 90 m/s spring has been calibrated for a 363 mm inner barrel and a D-type cylinder gearbox (for inner barrels from 301 to 400 mm).

Of course, with a shorter or longer inner barrel, performance will decrease or increase, therefore the calibration will be harder or softer.

In the calibration process, the thickness of the spring guide and piston head was not taken into account.

Thus, starting from equal initial conditions, you should consider an increase in performance of approximately 2.5 m/s for each bearing.

The FPS spring is 100% Made in Italy and is produced in collaboration with top companies in the sector. The material used is polished steel wire and pre-hardened carbon steel wire with added silicon and chrome EN10270/2.

In the immediate phase following formation, the spring is stabilized in an oven at a temperature of 400 degrees Celsius for thirty minutes to enhance durability.

The spring has variable pitch coils in the central area and in the area in contact with the spring guide and undergoes a grinding process on both ends which guarantees optimal performance in the compression phase.

The product dimensions are:

- length: 170 mm

- outer diameter: 14.30 mm

It is recommended to use the spring in combination with a ball bearing spring guide and AEG piston heads for ball bearings to ensure maximum performance and durability.