Ok so a few questions on what suppressor(s) I should buy. So first I'm looking to supress a 40 however heres the catch I have 45's and 9's that I wouldn't mind supressing. The suppressor I want to get for my pistols is an osprey. But what I'm wondering is if i get a 45 ossprey how well will that work on a 40 compared to a designated 40 can and I know to use it on separet calibers you have to change a piston but I dont know what that means so hopefully someone can enlighten me.