Dunno, but I think if the country wants to solve their "Homocide by Gun(s)" problem we need to go in another direction. That's because few killings by gun are done with an assault rifle or any kind of rifle or shotgun. They are committed with Handguns, and STOLEN Handguns at that.
Let's make our Representatives, if they're bound to have a political effect on this discussion, legislate "Mandated Sentencing" for possession of a Stolen Firearm.
I'd say 5 years for possession and 10 years for possession while committing a Felony. No Plea Bargains, no Probation, no Parole. Just hard time in the state of federal slammer. That would be the difference between our current gun and drug laws and serious law to take "Guns off the Street" . .
Few criminals go to a Gun Store and buy a Glock or S&W for $500+ so they can go hold up a Bodega or EZ Swipe for $75 . . That's a lousy Return on Investment, even for dummy who dropped out of the second grade . . Nope, it's the stolen pistols and sawed off shotguns that are the "Guns d'joir" in the crime business. We buy 'em, they steal 'em . . . based on that theory, Obozo and his Socialists want to punish you and I instead of the thieves . .
And . . If a person is really pissed, and has decided to kill somebody, one way or another He/she is gonna find a gun, so I don't see this as much a "Gun" problem, but a "Person" problem . . And if you make 'em all illegal then you've created several million pissed off "criminals" because few of them are gonna turn them in . .