That's where Magpul's next invention comes in, the AFG-BW (advanced fore grip - body worn). This larger version of the AFG is two feet long and stands 18" high. It is designed to be mounted on a chest rig picitiny rail. When using the AFG-BW, if the shooter goes prone, the wedge shape tilts his upper body upwards and stabalizes it in a raised position allowing proper monopoding off of straight bodied magazines up to 95 round capacity. It may sound kind of novel, but the physiological approach to the supination of the spine should lead to a more natural comfortable shooting position. As a bonus, if used for long periods of time, such as in a sniper overwatch role, the shooters legs go completely numb making for a more comfortable watch period.
And remember....this isn't tennis.......they bring the unfair advantage to the battlefield