Yeah but S hasn't hit the F, and there is no 5.56 to be found at a reasonable price right (if at all) and probably not for another year. I guess the guy will have to wait for the civil war, and his neighbor to go so he can raid the ammo stash to get any practice?
In the unlikely scenario where people are dead on the street and you can go over and pick up their ammo off the ground, we're all probably gonna be dead.
Also I think there are more practical caliber choices in today's word for the ar than 5.56. 7.62 and 6.5 grendel both offer deer hunting capability in the state, 5.56 doesn't. I'd suggest also that in close ranges, sub 200 yards, 7.62 would out perform 5.56 against human targets. Granted I've never been one to stick with tradition.
There's not going to be any 7.62x39 at a reasonable price after Gun Ban Joe takes office in January and bans importation of cheap steel case Russian ammo.
7.62x39 is for AKs anyway, not ARs. And 6.5 Grendel has very limited availability and is just as expensive as 5.56/223 right now. 300 Blackout is especially ridiculous, more expensive than .308 Win.
This is not a good time to buy, but I'd still stick with 5.56 in an AR platform. I doubt that it's being purchased for hunting.