cut the spring

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Im going to replace the 130 spring with the stock 100 in my m4.  I was wondering what to do with the 130 spring, as its too much for the fields in the area.  Can I cut a coil or two down a little to weaken it? I thought that once it had a few thousand rounds in it the spring would realax but that is not the case, i need to take it out. Any thoughts. I  could short stroke the piston, increase rof, and not compress the spring all the way. ??

[ZDiesel]

You could shortstroke it, but generally when shortstroking a gun, you lose around 10 fps per tooth for the first like 3 or 4 then it starts getting more dramatic. Otherwise, you could just take a pair of clippers and cut it a little but shorter, I would say 1.5-2 coils would do the trick.

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cool, I will cut the spring a bit shorter!

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That worked well, I dont have a chrono but I only needed to lose 15 or so fps. Wasnt sure if you were gonna be there today with chrono.

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I cut one and half coils out, and now im at 416 with .25.

[ZDiesel]

Wooo....man is that fricken close...haha

that should be around 446 with a .2