In most states you can own pretty much anything as long as you follow the proper rules.
About 10 years ago I had a Ruger 10/22 that was suppressed. I bought it in columbus, paid 400 for the gun, 200 for transfer fees and taxes and waited a month before it all went through. I had to fill out paper work, go get photographed, finger printed, poked and prodded. But it all went through.
Its a Class 3 transferrable weapon. Its a lot of work, but you can buy some neat ass stuff!
You must have a spotless record in order to buy anything like that. Not sure what its like these days but it was 200 bucks just for the paper work, even if you were denied.
There was a store in Columbus Ohio, full class three, you could buy real AK-47s, Uzis, m16s, m3 carbines, thompsons, BARs. Anything you can think of they had, even had an MG42, if you wanted to pay the 50k price tag.
Right now I don't own any pistols but a nice Kimber 1911. I have 59 guns in my collection, from .17 HMR to .338 Laupa. None of them have been shot in at least 5 years. I take them out wipe them all down with the silicone rag once every 2 months, and put them all away.