-Answered Thx!- TM SR-16 w/Systema m100-120 upgrade
 

I got a TM SR-16 with stock internals, except that I put oiless prometheus bushings into it. I just got a 9.6 volts 1700 mAh battery that came with the G&P crane stock.

My question is wich spring is the best for a little more power?

I can get the Systema M120 for about 12 US$ and the m100 sor about 10 US$ so is the M120 too much for the gearbox and can someone tell me about how much FPS will I get using one of them?

Oh and btw,I know Illusion made a spring chart but he made it with .20g and Im always using .25g.

Thanks!

I would recomend M100 , because with M120 your auto fire will lose much acuracy .

I am currently running my M4 with one of those complete systema M120 boxes. I am shooting at 340ish give or take 3fps with 0.25's, so about 360-ish with 0.2's.