12-01-2015, 11:37 PM
I like the idea, but just a generalazation here. Stable= Sturdy, Sturdy=Heavy, Heavy=Cumbersome, Cumbersome<Mobile. Also the fact that a vehicles suspension is not a solid base, especially when putting 2-300 pounds aft of the rear axle. Supports to the ground would help, yes, but there again that adds weight and bulk to the overall package. Also, depending whether your laying parallell or perpendicular to the vehicle it will resonate muzzle blast back towards you, making for uncomfortable shooting.