The foregrip is just like any other for close quarters. When you need a stable platform, hit the buttom, the grip splits apart into legs. There are extended legs in the grip and the leg height is adjustable.
They're much more stable than the ones were the legs come out of the bottom of the foregrip, making it look like an upside down "y".
I prefer these over the standard bipods as it doesn't get in the way if you need to manuever.