you make a good point about the ejector, to be honest, minus taking the slide off and barrel for cleaning I haven't had the bolt or the ejector off in a while. I will start there, take some picture, post and see what you guys think. My dad owned this gun for about 20 years , then it was given to me and I have had it for 5 years. Each year we go to the range about 5 times and each time we shoot 100 rounds per .40 and 100 rounds per sig. So that's 1,000 rounds per year, so I would guess 25,000 rounds. All on what I think is the original barrels and magazines.