I recently purchased this gun (https://www.buyairsoft.ca/gandg-m16-a3-max.html
) and I'm concerned that the M140 spring (that the gun comes with) will wear out the internals rather quickly. Therefore, I'm considering replacing the spring with a M120 or M130. However, I don't want to do this unless I have to because I generally play more of a sniper's role. Thoughts or advice anyone?