LOL, yes, that is the lafette, and its ingame, and it is my wife.
Its fired by depressing a lever on the right side of the tripod, which operates some mechanical stuff that pulls down on the trigger of the gun to fire. The MG recoils into recoil springs (much like an artillery piece), and there is a searching fire mechanism to walk the shots slowly upwards over the course of a 5 round burst, allowing one to only have to swing the gun from side to side while in cover as you fire. Also it had a 1.5x zoom scope for long range fire, and was accurate (50% of rounds on target) to a range of 3000 yards, although at such extreme ranges they often used forward observers to walk their fire onto targets.
I've had the distinct honour of serving on a lafette multiple times in reenacting, and they're just so godlike. Its really the only tripod in WW2, or even today really (a modernized version is still used), that actually was not just 3 big legs. It was purpose built, well designed, rugged, and turned the tripod MG into a veritable sniper machine gun with its recoil springs and scope, unlike such tripods as the american and british designs.
Lafette Love <3