After using my AR on coyotes I'll never use a bolt gun on them again. I have a "tweaked out" extremely accurate bull barrel DPMS topped with a 4.5x-14x Burris and it's now THE coyote rifle for me. 1 time I was able to get 3 coyotes from a pack with 5 shots (my all time best in my life)-with a bolt gun I'd never have gotten over 1 and possibly 2, but I doubt 2.

The AR is legal in most states to hunt varmints or predators with, check your local hunting laws. I know of no state that coyotes are considered game animals. The only thing you might have to be concerned with is magazine capacity-the magazines holding a gazillion rounds MAY be illegal. Stick to 5 or 10 round capacity and you'll be fine.