FPS SOFT AIR 110 m/s spring FPS

The 110 m/s FPS spring was calibrated on 363mm barrels and gearboxes with Type D cylinders (for barrels from 301 to 400mm).
Naturally, with shorter or longer barrels, performance will decrease or increase, necessitating a harder or softer calibration.
The thickness due to the spring guide and piston head bearings was not considered in the calibration process.
For this reason, under the same initial conditions, a performance increase of approximately 2.5 m/s per bearing should be considered.
The FPS spring is 100% Made in Italy and was developed in collaboration with leading companies in the sector.
The material used is blued and pre-tempered carbon steel wire with added silicon and chromium EN10270 / 2.
Immediately after forming, the spring is stabilized in an oven at a temperature of 400 degrees Celsius for thirty minutes to optimize its lifespan.
The spring features variable pitch coils in the central area and in the area in contact with the spring guide, and undergoes a grinding process at both ends to ensure optimal performance during compression.
The product dimensions are:
- length: 170 mm
- outer diameter: 14.30 mm
It is recommended to use the spring in conjunction with bearing-equipped spring guides and piston heads to ensure maximum performance and longevity.