This brief U.S. report on the German 128-mm antiaircraft gun appeared in Tactical and Technical Trends, No. 26, June 3, 1943. [DISCLAIMER: The following text is taken from the U.S. War Department publication Tactical and Technical Trends. As with all wartime intelligence information, data may be incomplete or inaccurate. No attempt has been made to update or correct the text. Any views or opinions expressed do not necessarily represent those of the website.]

GERMAN 128-MM AA GUN The 128-mm (Flak 40) antiaircraft gun, which exists in both mobile and static versions, is also mounted on railroad cars. The predictor used is Kommandogerät 40 (Üg 37), which is also used to control the 88-mm (3.46-in) and 105-mm (4.14-in) AA guns. The performance of the 128-mm (Flak 40) is at present unknown, but details may be similar to those previously published* for the 127-mm AA gun. These figures, which remain unconfirmed, are: Length of bore 50 cals Muzzle velocity 2,500 f/s Max. horizontal range 19,600 yds Max. vertical range 42,600 ft Weight of projectile 55 lbs Rate of fire 8 rpm Elevation 0° to 90° Traverse 360° * See TM 30-450, p. 333 (Handbook on German Military Forces) and MIS, Special Series, No. 10, p. 45 (German Antiaircraft Artillery).

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