An ar-15 (5.56) with 30rd magazine full of 75gr bthp is all you need for ANY bear period. if i ever hike in grizzly bear country you bet ill have a glock in 9mm or 45acp on my hip weather its "legal" to or not. im in black bear country now so i dont think ill need anything more than a pocket gun. any gun is better than bear spray... take a .22lr pistol!