FPS Softair M110 mainspring for AEG replicas

FPS Softair M110 mainspring for AEG replicas

The spring is made entirely from steel with the addition of silicon and chromium EN10270, which will translate into increased strength.
The spring has an irregular coil in the central part and both ends have been subjected to a grinding process, facilitating the spring's tensioning phase.

The spring was tested using a 363mm barrel and a D-type cylinder (for barrels from 301 to 400mm)
Outer diameter 14.3mm