You'll get a lot of hits on that because the media calls every long gun an AK47. No criminal in his right mind would use one, it's expensive and objectively terrible.
Fully automatic weapons are exceedingly rare. I know everyone thinks gang members are just flush with first-world armaments but most are using handguns. Easy to get a hold of (either stolen or straw purchases) and easy to conceal. Other than organized crime, street gangs have very few contacts for illicit imported weapons purchases.