In November 2015 in Paris, terrorists killed 130 using fully automatic M70s and AK-47s. Doubt anyone can buy these in any French gun store.
Not sure what banning "ugly" rifles is supposed to do do. (Except for incrementalism -- "Okay, that didn't work. What can we ban next?")
In 2011 in Norway, Anders Behring Breivik killed 77, including 69 who he shot using a Ruger Ranch Rifle.
Well, just to be clear here, the Ruger Ranch Rifle IS a AR-15, just in sheep’s clothing.