You really don't know what you're talking about newberry.

I wasent going to call you a newberrie but i was going to ask if you could elaborate on your feed back as i took the time to produce proper feed back on the HMG , as was requested by the op . If you wouldent mind good sir i would be greatfull .

The HMG dose suffer from barrel wander and it only gets worse as you skill up the HMG operation and capacity skill books becaus the longer you fire the more the barrel wanders because you have a greater mag and a longer burnout but as i said the longer you fire the biger the wander , as i mentiond about accuracy it only decreases your spread . you have to be good to keep it on a moving target for more than a second when in full sipn whic i also stated dosnt kick in untill you are half way through your burnout . The reason it gets more accurate if you need the lore is because the firing barrels spin in opposing directions therefore creationg greater centrafugal force directly to the center of the gun llowing a direct stream of lead but creating greater barrel wander .

No, by damage per round, the HMG is firing a smaller round than the SMG, at twice the fire rate. It has just over twice the optimal range of the SMG so it's charge would be a bit larger. If an operator is able to fire the SMG easily then a massively armored dropsuit like the heavy would be well able to handle the HMG recoil.

And there aren't barrels spinning in different directions. There's a weighed collar that spins to create a counter gyroscopic force, that combined with the gyroscopic force of the barrel group makes it a very stable platform. In real life this collar would just prevent the tendency of the gun to slightly pull to one side at the start of firing.

Again in real life, infantry operated miniguns mostly operate off pintle mounts. Look up YouTube for any number of videos showing how stable and accurate this is.

Fair enough, this is not real life, so designs/changes don't necessarily have to follow physical laws as we know them.

As to peoples accusations of the heavy having pin point accuracy with massive range beyond the AR, create an alt character and try it out. You'll soon be eating your words. When a heavy might be wasting ammo and tickling you at long range, they might very well have a team mate tearing you up with an AR, but manage to get the killing shot. The HMG is useless at long range. One lad up above saying 80m. Come off it. Try the setup out first so ya don't have to pretend as to the facts. Yes, the assault version has a max range of 80m but it's cone of fire is massive at that range.

As to the OP wanting to know our thoughts on HMGs and SG, Snagman 313 puts it more or less as I think. Being lazy, I won't type it out again.

Yes and no. Trying to move forwards, backwards, left, right from the direction you're firing would be unrestricted as the plane that the force is being exerted on isn't being changed. Trying to tilt the gun up or down or twisting to the left or right etc., would be attempting to change the plane of force and therefore would be resisted. While still being very stable, more force than normal would be needed.

The fact is, this force makes the gun very accurate, but slow down movement as the force tries to keep the barrel group and collar in the same plane as they were when the spinning started. Ingame, moving the muzzle of the gun while firing is alot slower than when not firing so it kind of sticks to a semblance of RL physics. That's why it's easier for lighter suits to circle close to a heavy while it's firing but keep out of it's fire. Once us heavier stop firing we can track ye easily and commence the wall of lead trick

An easy trick to see this force for yourself is to get the front wheel off a bike. Prop one end of the axle on a shelf, table, etc., with the wheel vertical, and while holding the other end of the axle between your fingers, give the wheel a good fast spin. You'll now be able to lift the wheel up with with just your fingers on one side of the axle and nothing supporting it on the other. The gyroscopic force keeps it in the plane it started spinning in.

A demonstration from Youtube if you want. It nicely shows how the collar works too.
http://www.youtube.com/watch?v=LrTw7EdyW9A