Loving the Batmobile!
A tank pivoting its chassis is a turn, and can only be performed with a move.
Turning the turret is not considered moving, so can be done with a Fire order. I wouldn’t allow it with an Ambush order, but that’s RAI.
As SteveT wrote, MMGs spread the risks/increase chancing of doing something minor rather than nothing.
To answer your other question, size of the gun doesn’t factor here, imo, as its chances to hit are the same (disregarding range, obviously).
I don’t know that there are. Perhaps you mean Sturmpioniere, which are on p.25 of the German 2nd ed. book.
I agree, on both counts. Examples include the different German boxed sets.
That said, there are also upsides: the beefier models are much more resilient (which is important to me as a wargamer) and the more restricted poses do mean that the figs are easier to assemble.
It can also be fired as a Light AT gun. As always, state before firing (or going into Ambush) what shell you are using.
This is an excellent litte gun, and a near auto-include for many players of the British that I know.
A unit can only shoot at targets it can see. Hence, the targets outside the forest are not relevant. Hence, the soft cover for the forest applies to the targets available to your opponent.
As an aside, these two men are the only potential casualties your unit will take from enemy fire, unless it uses a template.
Hope this helps.