I'll take this at face value. I don't think restrictions are the answer in the least when it comes to armaments that are within a certain scope of control. This would include cutting weapons, blunt weapons, other hand held, and firearms. I used to be much more lax on things when I was younger but have come around to being fine with things that are provably common sense, I have no problem with "shall issue" CCW requirements due to the fact that many criminals will hide a gun to ambush others, even though most will do so regardless of the law at least there is a basis to add charges should they engage in that cowardly act(this is not a condemnation of concealment in general, rather "conceal to ambush").
The reason I believe that ordinance can be licensed without issue is due to the blast radius and storage issues, for instance C4 was the preferred explosive of the Marine corps when my cousin was in service. He tells me when it's new it's predictable and a pound can take out a city block, but as it ages it destabalizes and can blow at random. Many explosives are dangerous just by the mere existence thereof and even trained and licensed professionals can have an incident. Thus I believe it has a smaller circle of protection due to these issues.
The reason I believe all firearms should be legal is that they really can't do any harm sitting in a gun case, as well if some jackass decided to duplicate the Hollywood shootout someone with the right firearms can easily aid the police or NG called out to the scene. The only problems I've truly seen with autos are when someone doesn't take the rideup seriously and ends up throwing wild rounds due to lack of control, but I've seen people do stupid stuff with semi-autos, shotguns, and bolt-actions as well. I actually lost a cousin to the age old "throw me my weapon" mistake. That being said I believe autos are more than protected if we interpret the constitution correctly, disbarment of those arms should follow the same due process as any other firearms. No criminals, involuntary commission to a mental facility, etc. I will grant that I could even accept a simple licensure for full-autos and select fire if it is available to all who may possess firearms and are willing to pass a proficiency test and psych eval. and if the 1986 machine gun ban were to be repealed. I would concede that as a compromise.