August Coenders (1890 — 1974)[1] was a German engineer working for Stahlwerke Becker AG during World War I, where he built a 20 mm antiaircraft gun.

[2] In the 1930s, he worked for several years in the UK, and in Putaux, France[1] as well as at Oerlikon, Switzerland.

[3] In 1936 Hermann Röchling brought him to Wetlzlar, Germany, where he worked at Röchling'sche Eisen und Stahlwerke GmbH during World War II .

Cönders designed the Röchling shell that was tested in 1942 and 1943 against the Belgian Fort d'Aubin-Neufchâteau and the V-3 cannon.

[6] He was involved in the development of several firearm designs: submachine gun, machine gun, Röchling Volksgewehr and Volkssturmkarabiner.