You can use them for deer in Texas.
A buddy of mine used a Mini-14 for hunting black bear in Alaska, it can be done but then again you can kill an African lion with a .22 short if you are close enough and accurate enough.
On another topic I see a big world of issues coming up, the latest run on AR rifles by your average shooter, your casual shooter, your first time buyer and your average dumbass who is too lazy to clean what he fires.
The AR is NOT the best first time rifle, its NOT the nest for lazy or stupid people. Its the fault of the black rifle cult and gun buy hype that people flock and race to buy this platform.
There will be many casualties from those that fail to maintain their rifle, and I also see a lot of new owners immediately trying to out bling each other, like the movie Cars in the end you see Hummers with those cartoon wagon wheels too afraid to get dirty.
Professional scuba divers rarely use an expensive dive knife, because trying to retrieve one may cost them their life.
I expect that when the revolution occurs you will have a portion of AR owners that will be afraid to get their AR dirty and the morons that fail to clean it right and it fails to function.
I have two AR15’s, will I use them?
You betcha, I can get at least $2,000 each for them right now. I need more mags for my M1A.