Why would I order a rifle from a catalog and wait for delivery when I can literally drive 5 minutes from my house and walk out of a store with my new rifle less than 30 minutes later? This isn't the 1890's, S&R catalog division shut down a long time ago and it had nothing to do with guns.

A background check has never been a problem for me. If a background check has been a problem for you, then I'd say they are doing what they're supposed to do. 

I don't want a machine gun. But if I did I would fill out the paperwork and get one. Whether or not it's in a hardware store would be no impediment. I had a suppressor for one of my pistols I used to own. Nothing stopped me from getting that suppressor.

What are all these problems you are having getting guns? Maybe I can give you some tips?