Dedalus
Mercurial and fleeting
And the AR-15 type guns that are legal in the US are not assault rifles, as they are not automatic weapons. They do not spray bullets like a machine gun, the trigger is pulled for each bullet shot.
Even if it requires a trigger pull for each shot, it allows for more rapid and longer shooting sessions before having to reload than a standard shotgun, I think. These weapons seem designed to kill multiple people at a time more quickly, which makes them more suited for military use.
A semi-automatic can fire 20 shots in under 10 seconds. You know, in case the deer is getting away.