Naval 3-Inch Mark 21 Mount

Left and right-side views of the Mark 21 mount for the 3-inch/50 cal. naval gun from Naval Ordnance and Gunnery, NAVPERS 16116, Bureau of Naval Personnel, Training Division, May 1944.

The 3-inch/50 cal. gun and mount (Mark 21); right-side view.

The 3-inch/50 cal. gun and mount (Mark 21); left-side view.