FPS SOFT AIR spring for Well MB03 140 m/s

The 140 m/s FPS spring was calibrated on the original mechanics of the Well MB03 rifle.

Of course, with shorter or longer barrels, performance will decrease or increase, so you will switch to a harder or softer calibration.

In the calibration process, the thickness due to the bearings was not taken into account, so, given the same initial conditions, a performance increase of about 2.5 m/s for each bearing should be considered.

The FPS spring is 100% Made in Italy and was manufactured in collaboration with leading companies in the sector.

The material used is burnished and pre-hardened 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 in order to optimize its durability over time.

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 at both ends which ensures optimal performance during compression.

Product dimensions are:

- length: 210 mm
- outer diameter: 10.25 mm