I know this topic came up and did search first before i decided to post this, but those of you who have the JP spring installed.

Did you notice a difference? I just installed the kit i did notice a lighter pull. I'll find out this weekend once i take it out to the this weekend.

Also if you have a slidefire but did not replace the trigger with a 3.5lb trigger, did it work fine with just the JP Springs?

Sorry dont flame me and tell me that this topic has already came up on another thread

I have them, and they've been in for a long time. They have been 100% reliable. I believe my trigger's pull felt lighter after they were installed, but it's not a night and day difference. Honestly, I didn't expect it to be for the $10 +/- that the yellow springs cost. Combined with the "set screw" modification, I really like the trigger now. For quick shooting, it has almost zero pre-travel, resets well, and is light enough. I don't use my 15-22 for any serious long distance shooting (where I'm trying for extremely tight groups), so the fact that it's not a 2 lb pull doesn't matter to me. I've never tried the slide-fire, so I can't attest to compatibility, but I'd have to think that if the stock trigger works with it, this would too.

I put them in my 15-22 when I first got it and had a less than one pound (measured) reduction. Others have had better luck. I just put a Jard FCG in it and threw the JP springs in the parts box.