There is not a problem with the concept, per se, however there are some obvious defects. I have killed a few from the prone position, in fact, I have been in a few situations where prone was the only option to avoid detection, but those situations only occur by chance, rarely by design. Further, one in the prone position has to adjust two factors rather quickly on a target as close as a turkey should be before pulling the trigger, windage and elevation. This device allows for neither. One is better served by practice holding his gun still and using a knee to both stabilize the gun and rest muscles for the moment of truth.