That's a more involved process that will require total disassembly of the lower part of the gun (from what I was told). I want to put an enhanced hammer spring in my KSC G17, and I think it's just more than I'm willing to do to my poor little gun for fear of killing it.
I also have a 190% hammer spring for my KJW M9 and haven't had the balls to tear that gun apart either.
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