I'd be interested to see if this...

...turns out to be the case.

When it was over, the suspected gunman lay dead amid an armload of weapons. Sources told News4 that surveillance footage showed that he began his attack with a shotgun, but was found with a 9mm pistol and an AR-15 assault rifle.

NBC News correspondent Pete Williams is reporting Alexis purchased a shotgun in Lorton, Va. during the past week or so.

The suspected gunman appeared to have seized firearms from two of his victims as he moved through the building along the Anacostia River in southeast Washington, where 3,000 Navy employees go to work each day, many of them carrying authorized firearms.

Not that it'll put the kibosh on the prohibitionist's attempts to use this as their new platform for gun control. They'll just add Joe Biden's weapon of choice to the prohibited list.

H/T to Clayton.

[UPDATE: 9/17/2013] No AR-15 was used. The shooter used a shotgun and two pistols. No confirmation on whether the pistols were taken from his victims. None of this matters to the prohibitionists. The AR-15 is still the mass shooters weapon of choice if you limit your set to the incidents that fit your agenda.