1vs1 it’s equal to “normal” MG if you are prepared and worse if you are not.
1vsSquad it’s equal to “normal” MG if you are prepared and worse if you are not.
1vsMany it’s better than “normal” MG if you are prepared and worse if you are not.
1vsMany it’s worse than HMG nest but it can move.
I really don’t see an issue here.
Also by some miracle this works in other games.
I would be ok with limiting ammo to one long belt. Maybe two but no resupply from ammo crates? That’s up to discussion once we have some data about performance.
Personally I’d move 100 to BR4 as they get heavily nerfed by those mechanics. Then 200 can be BR5.
Find them yourself. That’s not the topic of this post.