I went through what I have, and this (e.g. Navy Combat 9) kind of confirms my suspicion - i.e. that the hammer & sickle wasn't representative of Russians, but rather communists in general. It may be that the respective artists were unaware of the distinction betweeen Russia (hammer & sickle) and Korea (red star) - but I doubt it as one of them is Severin, and he was perhaps the most detail oriented of all the GA artists. It may be what the editor wanted to get a broader appeal of the propaganda. It may also be that the Russians provided equipment to the Koreans with the hammer & sickle on it. But as evidenced by the Navy Combat 9, it's clearly Koreans with the hammer & sickle equipment.
On the other hand, look at the Spy Fighters 7 - you've got Koreans coming around the corner and the wall has a Nazi eagle with a hammer & sickle. This is Heath, another stickler for detail. Mick, if he's going to be in SD this year maybe you can ask him about this.
OOBA DOOBA! I just love those Atlas frogmen covers. Nice pair!
Is that Navy Combat #9 a River City?
Bill