You could always use the concept for my Italian mg squad? Once upon a time I worked some bit for an italian faction. But that like many other things I start never got finished XD However, They would have the Breda mg but you could switch that to mg37 or something else cool looking :P
However, what this mg is unique to the differant mg is that its deploy faster than the regular mg42. However it was based on the Breda which is mag fed so it had to reload much oftener than the mg42. which the enemy then can take advantage of.
It could maybe also have an abilety called turkey shoot or something , cost 45 ammu?
This make the mg rather kill instead of suppress for maybe 25 sec? This means the enemy will take tremoundus damage if being fire on. But they wont get suppresed.
The balancer is going to hunt me down big time ( I actually wrote bladerunner the first time lol XD) but thats at least something if you now want a reward unit for the mg :P

My English is kind of useless. But that because Iam swedish Wooohoooj! ;3