Hmmm, to my eye, the aircraft look like F-14 Tomcats or an F-15. The Mig-29 was copied from the F-15, so how would you tell the difference?
There are US SF units who can carry whatever they want. Many do choose the AK because the looser tolerance makes it highly reliable. At least they did 30 years ago. Or maybe it's a picture of a US soldier with an ally in Afghanistan? The guy with the rifle isn't wearing a helmet and appears to have cloth draped around his head.
The guy on the far left clearly has an M-16, one person has a shotgun. The guy in the middle, it is unclear, but neither a M-16 nor an AK.
Maybe don't be so quick to judge and try to consider that you might not have all the information you think you do?