If you look closely the back and folding stock portion are from an mp40 or similar while the mag seems from an SKS
Half the dust cover is completely gone, plus the back part, where the fixed stock should go is completely rounded
The AK series of rifles has been in constant production since 1947 in over 20 nations, where it was licensed, and at least twice that many where it was made without the benefit of licence. The basic design has undergone three revisions officially and has been modified into well over fourty different designs in many of the nations that were licensed and was changed to suit local manufacturing limitations in many of the nations where it was not licenced. The folding stock model has been made in all of those revisions and most of the nations that paid for the licence. It has been made, officially, in a range of calibers from the 5.56 Russian up to a 12 gauge shotgun.
The Russians took themselves a lot of German scientists and German manufacturing. They didn't give a damn about Nazi patents or licenseing so they stole from the Germans heavily to make the original AK. The MP-40 was one of those Nazi German weapons so it has much in common. It is in fact mentioned specifically in the Wookiepedia article "AKS – Featured a downward-folding metal stock similar to that of the German MP40, for use in the restricted space in the BMP infantry combat vehicle, as well as by paratroops." The Wookiepedia Article is very informative, I suggest reading it, I enjoyed learning a number of facts that had escaped my knowledge of the weapon. Did you know the Isrealis have their own modified version of the AK? I didn't. Cool to know, if the Isrealies are stealing your design you've done something right. Those folks know their hardware.
There have been some model of rifle based on the original AK-47 in every conflict of the late 20th century and still is going strong in the 21st. It is one of the most durable and reliable weapons ever made and can fire as well brand new off the line as it does after being immersed in mud (As long as the barrel isn't plugged of course). It appears on flags of a few legitimate nations and the banners of some terrorist organization. It can be easily identified from its rather distinctive sillhouette by Aboriginies in Australia who have never met white men or seen a television. Ok, that's an exageration. But short of being an Aboriginal in Australia who never saw a TV the odds of a random person recognizing the AK silhouette from a snapshot is pretty darned good.
Removing the bolt cover isn't much of a modification, if the model used even had a bolt cover. As for the SKS magazine, that's the same caliber 7.62X39 as the AK. The SKS magazine, developed for a handful of SKS designs (most were fed from stripper clips and didn't have magazine well) were slightly smaller than an AK series magazine. You couldn't safely use them in each other but in a pinch the magazine fed SKS models could be hand fitted to take an AK magazine. I suspect the SKS magazine (I've never owned an SKS model with a magazine well) will fit into the AK and might even work. I wont promice anything and your milage may varry.
They may not have used a 100% original Russian Made AKS-47 Series 1A with the bolt cover removed. It might be a Chinese Model 56 or one of the hundreds of possible variations made world wide that may not have even used a cover. It could even be a AKS-74 which uses a 5.56 round. Without analyzing the actual weapon I can't say. But it certainly holds the AK series look and styling. Even the stinky hippies who hate guns recognized it as an AK and cried that Disney was glorifying school shooters or some such nonsense.
I would argue that if someone were to remove the bolt cover from an AKS clone and put an oddball magazine in the well, pop a scope and some greebles on it would be real hard to argue it isn't a close enough replica of the weapon carried by that guy in Andor. To be honest I think any self respecting fan could make a far better modified version to look Star Warsish. If someone did do exactly that, short of having a good picture of the Andor AK would you be able to tell it wasn't an exact or even better replica?
en.wikipedia.org/wiki/Kalashnikov_rifle and en.wikipedia.org/wiki/AK-47