Wait! I thought he was found with a shotgun and a handgun? Which one of these is now an AR-15?
From Fox News:
“Two federal officials told the Associated Press that Alexis had an AR-15 assault rifle, a shotgun and a handgun that he took from a police officer at the scene.”
The 12ga MKA is on an AR platform:
http://www.youtube.com/watch?v=Uo4yO8pHvoA