SHS AEG M90 spring

SHS progressive M90 ??level spring for electric airsoft guns. Note! does not fit PSG-1 gun.

The M90 ??spring is designed to provide approximately 0.84 - 1 joule of energy, but it is important to note that the final power and energy are also affected by the tightness of the airsoft gun and other parts, such as the cylinder, piston, hopper and barrel.