Re: To remove restrictions from NFA....
Last I checked, there have been a grand total of two violent crimes committed with legally registered machine guns. BOTH of those crimes were committed by police officers. One of those guns was owned by an officer and used in a drug-related murder, the other was stolen by an officer and used on his wife. Also, a couple years ago a few towns away from me, a PA corrections officer shot a man with a suppressed 308 in order to steal his full-auto rifle (no lie).
While getting machine guns and grenade launchers deregulated might be a stretch, I think getting suppressors, SBR's and SBS's off the NFA would be quite doable in the current political climate. I mean think about it, who in the world can articulate a half-way cogent reason why a rifle with a 15" barrel should be more strictly regulated than a rifle with a 16" barrel? Sure, it's marginally more concealable, and so is a handgun or a takedown rifle. The law just doesn't make any sense, and most people know that.
With suppressors, the battle will be to change the "assassin" association by re-framing their purpose as hearing protection and common courtesy. Maybe we should start calling them "mufflers", it sounds more benign. It would make it a lot easier if hunters would start using them (in states where that's legal, of course), give them just a little bit of a sporting connotation.
Most Americans are actually quite pro-gun rights, and a lot of them are pretty rational, too. I think this is totally feasible, and I do NOT think the current system is working just fine. A nine-month wait and a needless $200 tax just to make my gun quieter is wholly unacceptable to me; and all the asinine little rules that keep changing, the ATF agents constantly searching for an excuse to put you in jail, nope, sorry, I am NOT okay with the way it is. More NFA guys for a quicker turnaround is a good start, but the whole thing needs to be done away with.
As for the argument that trying to kill the NFA would draw attention to the fact that these things are legal, I am convinced that the reason some people are so scared of suppressors and the like is that they aren't used to them. People are scared of what they aren't used to. If enough people carry around guns, nobody will be scared of guns anymore because they're exposed to them every day. Likewise, if suppressors are deregulated and become more common, people will get less scared of them.