Yep. 762 x 54.
But this is a romak psl-54c. A Romanian AKM with a long barrel and a sniper scope. It isn't a dragunov, even tho it looks similar. It has a traditional AK long stroke gas system, not the short stroke gas piston of a Dragunov.
It's not an AK variant. If I take an AK and mix it with another gun and sell it that doesen't make it an AK variant, therefore the PSL is not an AK variant
No. The ak-100 series has the ak-101 to ak-105. There are other Russian assault rifles named the ak-107, ak-108, and ak-109 but those have a different gas system so they're seperate.
there are earlier models such as the aks-74, but since I'm going to sleep the only older model that i'd say worth mentioning is the ak-9, unique because it's in 9x39,and the only AK in that round