As has been pointed out, the Sig is more robust and I would expect that it would last longer in regular use. However if I shot them regularly at 100 rounds per month, it would be over 4 years before reaching 5000 rounds and replacing the recoil springs. If the life expectancy of the pistols is 20,000 rounds with care, that's 16 years. What's the chances of that happening? So shoot and carry either one, you won't wear it out.

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