I read threads questioning when to replace springs. Magazine, recoil, trigger, hammer....Whatever. We seem to expect gun springs to fail after a few thousand compressions. My Glock 17 went well over 110,000 rounds before I replaced the recoil spring but some guys propose replacing every spring as soon as 2000 rounds. And that magazine springs should be replaced after 10,000 rounds. (that is only 588 compressions on a 17 round mag) Just as some food for thought I calculated that the valve springs on my truck had over 700,000,000 compressions before the timing chain failed. Do we really need to replace springs at the rate some do?