Earlier this summer I picked up a suppressor to use on my P22 and Sig 522 rifle, and now I'm hooked! The 22's are great, but now I'm thinking about picking up a 9mm suppressor as well. I currently have a Walther PPS and Springfield Armory XD in 9mm, but I'd have to pick up new barrels with threads to attach a suppressor. I've tried looking online, but have yet to find anywhere that makes or sells them.

Does anyone know where I could get a threaded barrel for either of these guns? Either online or in shops around NE PA? I'd hate to buy a 9mm suppressor just to find out it can't attach to any of my guns.