Oh, and do NOT, do NOT experiment with homemade suppressors with the subsonic .22 rounds. First of all it is illegal, and second, anything that much fun must be immoral, too. With a lever or bolt gun, it is REALLY quiet. From 100 yards away, you might not even be able to hear it. Too sneaky for me. Who wants to have an indoor basement firing range, anyway? It's just WRONG. Don't do it. Even though it is fun and fascinating and all. Resist the urge. You will go to hell for doing anything that cool, I would imagine. The washers and welding rods and steel wool and pipe will cost you an arm and a leg. I don't know how to do it and I don't want to know and you shouldn't even be the slightest bit curious if you know what's good for you. Steer clear of websites that show you how to do it, and never ever read books from Palladin Press and other publishers on how to make a .22 silencer. It will corrupt your morals and use up all your free time that you could be spending mowing the lawn or painting the kitchen or fixing the roof or cleaning out your sewer line. Just sayin.
So, how many silencers have you built so far?