C.W. Musser filed a patent for a “Gun Aiming Mechanism with associate trigger release mechanism and supporting mount” on February 24, 1953. This illustration with the gun on a jeep accompanied the patent.

“Fig. 1 is a side view of my gun aiming mechanism and associated trigger release mechanism with supporting mount shown in heavy solid line. For purposes of illustration the aiming and trigger release mechanisms are applied to a typical, large caliber recoilless rifle and its attached spotting rifle (both shown in light solid line), and the supporting mount is secured to a representative motor vehicle which takes the form of the jeep (also shown in light solid line). For simplicity of drawing the customary sighting system for the guns has not been shown.”