there is really no qualitative difference between them and any other firearm. the AR type are less powerful than many traditional hunting rounds and not so effective against barriers or at extended range. Even so, they are useful for shooting medium game at reasonable distances and are comfortable due to low recoil. It is a bad idea to let the post-constitution, post bill of rights social engineers ban anything because they really want to ban Everything. The pick out what they consider the most vulnerable target at a given time. Thirty years ago, it was "Saturday Night Specials": and they managed to get a ban on small handguns -regardless of caliber through one of the houses of the legislature.