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This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date c. 1943 Country of Origin United States of America Type ARMAMENT-Sights & Controls Manufacturer National Cash Register Co.
 Physical Description One (1) U.S. Army Type K-4 automatic compensating gun sight, as used for sighting .50 caliber M2 machine guns in the Types A-2 and A-13 lower ball turrets. Dimensions 3-D: 33 x 26.7 x 34.3cm (13 x 10 1/2 x 13 1/2 in.)
 Materials Aluminum, Steel, Paint, Plastic, Preservative Coating, Glass, Magensium
 Inventory Number A19990265000 Credit Line Found in Collection. Donor Unknown at this Time. Found on NASM Premises. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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