The 8 cm Feldkanone M. 99 was a field gun used by Austria-Hungary

Austria-Hungary

Austria-Hungary , more formally known as the Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of Saint Stephen, was a constitutional monarchic union between the crowns of the Austrian Empire and the Kingdom of Hungary in...

 in World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. It was designed in a rush because Austria-Hungary's neighbors had already begun the process of modernizing their artillery. This forced the Austrians to make whatever improvements that could be made without delaying the development process. For example various hydraulic recoil systems were evaluated, but ultimately rejected as they required more development time than was available. So the M. 99 retained the bronze barrel of its predecessor, but used an eccentric interrupted-screw breech to speed up its rate of fire, and adopted the carriage of the 9 cm Feldkanone M 75/96

9 cm Feldkanone M 75/96

The 9 cm Feldkanone M 75/96 was a field gun used by Austria-Hungary during World War I, a modernized version of the M 75 field gun. Virtually all the M 76s were upgraded during 1898. For cost reasons the new gun retained the bronze barrel of the original, although it was actually redesigned to...

with some minor changes, including improvements to the spade brake to reduce recoil forces.