I don't think you guys are even close. My vote would have to go to the Ljutic. (You never thought of that, did you?) Their life expectency is easily a million rounds. And then you might need a firing pin. There are so few parts in them, there is hardly anything to wear out. There was an article on Ljutic #1 a few years ago and it was used well past one million rounds. All that was put into it was a firing pin and maybe something else minor. I have been shooting mine pretty much for eight years and the only thing that I have had trouble with was the small pin that works the ejector broke. And I never wanted it to begin with. When it broke, I just kept it with extractors. But, the Ljutic sure gets my vote...... Perazzis are good too, but there are too many parts in them to go wrong. They are probably good for a few hundred thousand rounds.