An “assault rifle” is a fully automatic rifle firing an intermediate sized cartridge. A submachine gun is a fully automatic weapon which fires a pistol caliber round. The weapon in this case is probably a semi-automatic rifle, caliber unknown due to the ignorance of the reporters.
My mistake. I thought the difference was mag fed vs. belt fed.
In the original comment, I was trying to make fun of the headline. Most reporters would call my Remington 700 an assault weapon because it’s black.