Note as well that, as far as I can tell, he did not build an AK-47. He built a copy of the semi-automatic version that is available to gun enthusiasts. He did not build what your average user of an AK would call an AK: a fully automatic machine gun.
Are you sure its not a semi-automatic AKM? Also I don't think any user of an AK-47 would call either a machine gun, more likely a rifle. A user of an AK-47 would probably call a RPK a machine gun though.
