The 10 cm Feldhaubitze M 99 was a howitzer was used by Austria-Hungary during World War I.
It used bronze for its barrel and lacked a modern recoil system, using only an ineffective spring-mounted spade brake, and was virtually obsolescent upon its introduction. Nonetheless it was the standard field howitzer for the Austrian Army upon the outbreak of the war.
It donated its barrel to the 10 cm Gebirgshaubitze M 99, although few of those were made, being largely replaced by a version of the standard Feldhaubitze M 99 with a narrow, 1.3 metres (51 in) carriage for use on mountain paths. The axle seats were deleted from these narrow carriages in the interest of saving weight.