No offense, but those are not the AR-15’s ‘mission.’
The .223 cartridge is a bit on the anemic side for bears. They might be okay for deer.
But the .223 was designed for wounding men. It is also a pretty good target round.
“But the .223 was designed for wounding men.”
I agree. It was for putting men out of action without excessive mortality.
The .357 Magnum, however, is designed to coat the surrounding countryside with someone’s innards.