CYMA AEG SPRING - AK FACTORY M105 (HY-290)

The spring is one of the most important parts of an airsoft gun. The spring is the part that most affects the muzzle energy of the weapon and the initial velocity of the projectile.

The so-called steel wire, alloyed with silicon and chromium, is primarily made for electric airsoft guns (AEG).

The spring strength corresponds to M105 (5% deviation may occur) tested on an E&C M4.

We can only guarantee the parts we install!