AKs in the US have been semi-automatic for a long time. It takes an experienced gunsmith to restore fully automatic firing to an imported AK. They have been sold this way in the US for decades and are a cheaper alternative to the AR-15.
The point is, nobody is making or importing full auto AK-47s and selling them to gang members. A semiautomatic-only AK-47 is just the functional equivalent of a hunting rifle.