I was just in a skirmish with friends, and well I wasn't very satisfied with the range. My tighbore just came, its a prometheus MC51 and I'm puting it in tommorow, but I wanted to put in a better spring to boost my aeg to like 390. So now I was wondering whats better to put in a stock gun a CA 170% or a M120? If anyone could help me out that'd be great.