1: You can own an AR
2: Make sure you just have 20 round mags (very easy to find)
3: never have a round chambered in the rifle when transporting...this is actually a hunting designed law. You can have a pistol chambered, just not a rifle.

Those are the biggest issues. Other than that there isn't a BAN on the AR15 firearm, just on the magazine size...which is ridiculous.