I like the Russian way of simple, reliable, affordable rifles - since the M-16 was fielded they must have released a dozen or more first rate AK models (if not more) with different sizes and calibers.
Is it still the AK-104 that is the frontline infantry rifle for Russia or is there a newer model now?
The standard issue with is still the AK-74M. They made a very underwhelming "AK-12" design which did have a lot of improvements. They then scrapped that, and now made a new "AK-12" which is more or less a furniture upgrade for the AK-74M. This will become standard issue.
The cancelled AK-12:
The new AK-12 that will be issued widespread:
The main difference between the AK-74M is that they have some kind of locking mechanism for the dust cover. The dust cover moves around too much to mount optics, perhaps this fixes it. There were more robust options made stateside over the past decade as well as Polish versions. The crappy ladder rear sight is also pushed to the rear. In 2018 they should have flip down sights.
For example, here is an AK with American made parts that do the same thing:
While a little higher than the above, the Polish example:
To put it bluntly, it is fairly pathetic that is all Russia could muster to field.
On a similar note, the USAF will now issue a rifle superior to the Army and USMC. the M4 URGI:
Better barrel, profile, lighter rail, free floating and possibly a new BCG. Outside of SOCOM it seems the Army will continue to issue the circa 2000 M4.