While I don't disagree with the overall argument, there's a reason some players have more parts than others. I have a lot of parts sitting around because I don't upgrade every gun that falls in my lap. I'm picky about what I upgrade, because if you've played this game long enough you know damn well how a gun is going to work without even upgrading it just based on its stats. If players are running out of parts, it's partly because they're just wasting them on crap weapons.