I have a Mk2 Ruger Standard. Anyone know if I can buy a different barrel for it that comes threaded? A friend of mine has almost completed the process to get a couple silencers and we're trying to figure out a way to test them with the least investment. One of them is .22 LR specific, but neither of us has a threaded .22 ... gonna hit the LGS tomorrow, was thinking about it and this question popped into my head.