There we are! Hope that title caught your attention. As you can see, I believe that Marauders should add an AK74U (which is a Kalashnikov pattern rifle chambered in 5.45x39) because it would be pretty interesting to have something in-between rifle and smg, besides the Krasa rifle.
It could be chambered in 7.62 ammo like Krasa or SVT 40, or a new 5.45 PDW-esque cartride with managable recoil and decent damage.
Now, I know some of you may be saying, "We shouldn't have modern guns in Marauders". A good point, but I must point out that there are weapons in Marauders that date around/past 1970(when AK74u was made), like the SVU rifle or the APS rifle, and it wouldn't be a stretch that Raiders or CE Marines would run around with AK74us, as it is affordable, concealable, and 5.45 would be relatively cheap. If they wanted to make it more "dieselpunk", simply remove the dust cover and give it a metal mag instead of bakelite- problem solved!
In conclusion, the AK 74u should be added because it fits the lore, it would increase weapon and ammo variety, and AKs are just really cool.