The 100 m/s FPS spring has been calibrated on 363 mm barrels and gearbox with type D cylinder (for barrels from 301 to 400 mm). Naturally, with shorter or longer barrels, performance will decrease or increase, so you will switch to a harder or softer setting. The thickness due to the spring guide and piston head bearings was not taken into account in the calibration process. For this reason, under the same initial conditions, a performance increase of approximately 2.5 m/s must be taken into account for each bearing.
The dimensions of the product are: - length: 170 mm - external diameter: 14.30 mm It is recommended to use the spring in combination with spring guides and bearing piston heads to ensure maximum performance and durability over time.
