also this. :)

First gearbox I learned on was my g&g m4. Pistonhead broke. Tore it apart & fixed it up. Been into it a few more times since. install ascu, fix broken wire to motor & last time was to put an m90 into it to get me to 350fps.

If it hasn't been said already, if you want an easy gun to work on. Get a p90. End of story.

hi need help some new to the sport .i have a echo1 scar-l its about 386fps with the stock spring whats the best way to get it to around 350fps can any one help

Change the spring.

what kind m90 ???? changed to m90 got less 300 then put 120 got 398 what next m110 will it put me maybe 360 what do you say

90 (330-350fps) 100(350-370fps)

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.

Can anyone tell me why he just posted my sig and thats it. also i think i'm just going to buy a JG v3 and work on that so i don't blow my budget on a crap gun.

i put m90 (70fps) had air leak (cylinder head & air nozzle ) fixed it put m120 shots 398 fps .will a m110 get me to 360fps what do you think????:banghead:

I have an M120 in my SL8 and its shooting 425.

The M90 was giving you 90fps because something else went wrong when you re-assembled it. When you put in the M120, you probably did it "correctly" and thus got the 120m/s it advertises.

My advice is give the M90 another go and try to test the compression components as you reassemble the gun this time. Good luck.

know looking to see if i put modify sp110 spring will it get me to 360fps . fixed it put s100 modify spring got 354-360spf

If your gun is tuned properly a modify SP110 will probably put it around 380-390

I have a modify SP110+ in my M4 and I got 415FPS....