One thing, How can you guys shoot 50,000 or 60,000 rounds in a single gun? I was in the range Sat and Sun the whole after noon for like 4 years, I doubt I shot 10,000 to 15,000 absolute max rounds total with all my guns. Mostly I shot 22LR because it's cheap at $99cent per 50. At that, I broke my Ruger Mark II and I just repaired it.
I don't think I'll even put enough rounds through my Glock 26 to worry about the slide stop spring.
BTW, Even if you reload, it's a lot of money shooting 60,000 9mm rounds per gun!!!
How do you shoot 60,000 rounds??!! Back in the days, the range didn't allow us to speed shoot, it's 25 yds, you can't speed shoot.