I now have several threaded 22's - pistols, bolt action and semi autos. I now want to add an integrally suppressed semi auto to the stable. Does anyone have and shoot one that you like? Thompson Machine can convert my Ruger TD which isn't a bad idea, but I know nothing first hand about their work. I would really like to get an Urbach, but they are rare as hen's teeth. I know that it is cheaper so just use my Sparrow - but that's where I'm headed here. Any recs for or opinions against a particular manufacturer are appreciated.