The combination gun mount M42 formed an imposing structure on the rear of the MGMC M15. The armor gun shield moved in elevation with the weapons, but the turret body was open to the rear. The gun shield was eventually deleted since it obstructed the gun crew's vision to an unacceptable degree. The guns could depress no farther than +20° above the cab and 0° for the rest of their traverse. The right side fuel tank is visible between the cab and the turret. This half-track is fitted with the double coil spring loaded idler wheel, and the exhaust pipe can be seen in front of the track return roller. (Picture from Standard Nomenclature List G-102.)