From: Vermont, USA
Do MG only effect the unit they are firing at or is grazing fire and beaten zones implemented. One of the big weaknesses of CMBO, some what made better in CMBB and CMAK, was the weakness of MGs in defence because they were viewed as point weapons, not area weapons. Even ASL tried to rectify this with a rules quagmire called residual fire.
When given that question, I'll be the first to say that we also need a better HMG implementation when we do our next round of infantry combat improvements. Some kind of implementation of grazing fire and real beaten zones will have to happen in the future.
Right now, HMGs have an Area Fire box that is larger than any other "small arms" to give them some capability to create a beaten zone, but there's no grazing fire effect. HMGs do have decent firepower and are effective for their size and points, which makes them a good defensive weapon even though they are only a team in size - but it's definitely a case where we could do more to differentiate them from other infantry to give them some of their special capabilities.
With that said, they are no worse than the MGs in CM or SP, but they are also no better and making them more unique is on the wish list.