unknown aiming unit to identify

[Kurtl]

Could that be some part of a gun? Let's say something like the reticule? Any help to identify is greatly apprechiated. Thanks - Kurtl

 

[Johnny Signor]

Looks likethe type that would be mounted at/near the end of an aircraft machine gun barrel for help in aiming, check out the sites aboutr aerial machine guns, try the British,german etc types,
Johnny