Medal of Honor (2010)

[Markost]

The problem is the logistic, it´s easier to have a standard caliber (in this case the 7.62x39) for most of the weapons than having a mixture of cartridges.

Here's a picture of a Taliban with a G3 (probably of Pakistani manufacture, since Iranian G3s continue to have the old vented handguards).

Note the scope, it´s obviously used as a designated marksman rifle.