It's very clearly an AK-47. People will call it an AK-47. So they named it an AK-47.
You don't really...know much about AK-47s, do you? The basic Kalashnikov design has been made in many variations, in many countries under many names. The likelihood of it being an actual AK-47 is quite low. it'd be far more likely for it to be an AKM or something based on it.
You seem to think all assault rifles that look like that are AK-47s and they're not. In fact, most aren't. Actual AK-47s were only in wide use in the Soviet Union from 1956-1959. After '59, the AKM replaced the AK-47. Then in 1978, The AK-74 replaced the AKM.
Both licensed and unlicensed production of the Kalashnikov weapons abroad were almost exclusively of the AKM variant, partially due to the much easier production of the stamped receiver. This model is the most commonly encountered, having been produced in much greater quantities. All rifles based on the Kalashnikov design are frequently referred to as AK-47s in the West, although this is only correct when applied to rifles based on the original 3 receiver types.
[17] In most former Eastern Bloc countries, the weapon is known simply as the "Kalashnikov".
Source
Calling all Kalashnikov-style rifles "AK-47" is like calling all AR-15/M16/M4-style rifles "M16A1", (the earliest version used by our Military, back in the 60s-70s) when that is obviously not correct.
It should be called the "Kalashnikov", or just the "AK". That's what I call my Romanian WASR-10, which is certainly not an AK-47, but is based on the basic Kalashnikov design.