I would like to get a sound suppressor for a GLOCK, what will it take to accomplish this money-wise? I am somewhat familiar with the hoops you have to jump through, but what will it end up costing in time and money, considering I already own the GLOCK? Also, would it be better to get one for a 9mm or a .45? I have heard different stories about modifications that must be made to the pistol itself, so if someone would clear all this up for me, I would greatly appreciate it. Also, I see a lot of people getting a sound suppressor for their Walther P22, is there a specific reason behind this? It seems like you would choose something more powerful if you were going to spend that kind of money.