Original U.S. Navy Mark 9 Illuminated Sight Rear Sight Assembly The heat shield protects the

The heat shield protects the user from being burned by a hot barrel and can also serve as an attachment base for accessories such as sights or sling swivels

Offered with original hose and clamps

37 mm caliber anti-aircraft cannon fell into gradual disuse

This was the war AH used as a dress rehearsal of the WWII Blitzkreig

Original U.S. Navy Mark 9 Illuminated Sight Rear Sight Assembly The heat shield protects theOriginal Item: Only One Available. The US Navy Gunsights used during WWII and the early post wars years was limited to just three main types of Gunsights (and their many late war and early post war adaptations and evolutions); all of them being adaptations of British sights: The Mark 8 illuminated sight used for fixed gunnery that was a modified version of the British Barr & Stroud GM2 fixed gun sight (designated the Fixed gun Reflector Sight Mk II);