All smaller-mag-fed, all with proper balances to go along with the higher RPMs. A simple idea, so it'll either be liked or loathed. Take your pick. NC - 800rpm More or less the M27 IAR. TR - 900rpm HK21A1. Google it. VS - 850rpm ¯\_ಠ.ಠ_/¯
I'd definitely be broken as **** when built around the current model of LMG's that are basically glorified carbines, but if we could rebuild them from the ground up as bi-pod mounted MG's with greater speed penalties and accuracy penalties when not deployed, that could be an option.
Eh, maybe, maybe not. It would all depend on how deploying was handled, how the weapon's stats are when deployed and mobile, and what the accuracy penalties were. They could be anything from godly to awful to shotgun-like CQC machines with their RoF and poor accuracy.
Hmmm, not sure. HA are pretty lethal already. LMGs with AR and carbine rates of fire seem a bit too much.
So... Basically giving them Carbines? Oh wait, the better damage degradation would put it on AR levels. Wouldn't that be easier? And OP?