a lot of folks look for something for shtf times. my choice is the ar15. ammunition and mags are lighter. they are both pretty much identical in terminal effect in a shtf type environment.
less weight less space on the ammo means you can carry more food water medicines or other items.
reliability i give the edge to the ar15 IF you get one made to higher standards than your typical 600$ ar15. easier to mount optics or other addons to an AR15.
ar15 controls have better ergonomics.
anyways others have different opinions. but i trust the ar15 more than an ak47.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent