I tested LMG first time and I had a bipod attacted to it. I was laying on prone and ambushed four man patrol on valley.

I shot over twenty bullets and after that I saw four man lying down. Echo of shooting was great to hear and valley was silent after that.

The moment was epic. Sounds of the world and shooting was very satisfying.

Only thing only was missing. The bipods was not deployed.

So I suggest that the bipod would have animation and deployed when you are proning on the ground.