Luckily the SC has said banning ammo is the same as banning guns. And calling a 'bump stock an 'accessory' is a stretch... it changed the method you actually fired the gun with, and needed an ATF ruling to be legal in the first place.
Although it is a good parallel for the Canadian system. The ATF defined bump stocks as legal through administrative decree, and they made them illegal just by reversing that decree.
Although it is a good parallel for the Canadian system. The ATF defined bump stocks as legal through administrative decree, and they made them illegal just by reversing that decree.