Well, Tom, 4th out of 50 on the worst list doesn't seem like the model to use for me. But, if you guys want the pain of slugging through MD's gun laws, have at it. Here are two "summaries"' to start you on your way:
http://www.oag.state.md.us/Opinions/2010/95oag101.pdf which governs what the hell is an assault weapon or a reasonable facsimile thereof. And...
http://www.mcsm.org/mdlaw.html which is a summary of overall MD firearms laws.
Two things you can do to really check on what you can buy from here is go to a big arms dealer like Buds or some manufacturers sites and see what they are even willing to ship into this state. The other is to bring your CCW into this state and walk up to a trooper and say howdy. So few CC Permits are issued in MD because you literally have to prove some one is actually threatening your life or your job or business ownership is such that without being armed your life is naturally in danger. 90% of CCW applications are denied and the state brags about that. Oh yeah, MD doesn't yet recognize CCW licenses from any other state so perhaps you needn't do what I suggested earlier. Please notice on the banned "assault" weapons list how many are SEMI-AUTOMATIC. Any semi-auto that can accept a mag capacity of 20 rounds or more is a no-no. The laws here are convoluted and you are at the mercy of the Secretary of Police and your local Sheriff.
And, no, I don't want to move to Hawaii, New Jersey, New York or California (even though I lived there for a few years back in the 50's). I have enough frustration right here in MD.