Naval Deck Mount. For single Water Cooled or Air Cooled Browning .50 caliber machine gun. Completely Restored, with Swing Seat and Tombstone Drum Magazine and Crank. Four industrial wheels are welded to the bottom of the base. US Army designation: M-39 (Water-cooled), M-43 (Air-cooled). 1/4″ Armor Plate, Approximately 500 pounds, with Drum and Wheels. Water-Cooled Gun Kits, w/Pumps, Available. US GI, Excellent Condition.