I bought the Koplin bed mount for the Polaris. I used everything but the Koplin cases. Instead, I fabricated two bent steel plates that attach to the Koplin mounts to which I mounted two Scabbardtech scabbards (by far the most secure method of holding your guns) such that two scabbards are available for each side of the Ranger with muzzles pointing up and away from anyone. Takes up some bed space but guns are readily available for Sporting Clays and are protected by being in the bed.
Will post a picture over the weekend.