Can you bump fire a AK-47?
Bump stocks like this one installed on an AK-47 are now illegal in the U.S., after the Trump administration changed how they are legally defined. The devices can allow a semi-automatic rifle to fire nearly as fast as a machine gun.
What’s the difference between AKM and AK-74?
The AK-74 was equipped with a new buttstock, handguard (which retained the AKM-type finger swells) and gas cylinder. The stock has a shoulder pad different from that on the AKM, which is rubber and serrated for improved seating against the shooter. In addition, there are lightening cuts on each side of the buttstock.
Is the AKS-74U a submachine gun?

Submachine Gun / Assault Carbine [1983] The AKSU-74 represents a submachine gun derivative of the full-sized AKS assault rifle. Both feed the 5.45×39.
Are bump stocks illegal in TN?
A proposal to ban bump stocks in Tennessee failed in both the state House and Senate on Tuesday.
Is AK-74 better?

Advantages of the AK-74 The lighter and smaller 5.45 cartridge tends to yaw and fragment when it hits the body, whereas the 7.62 variant punches straight holes. Beyond that, the AK-74 increases the effective range of a soldier to 500 meters. The lighter cartridge also means lighter recoil.