15 cm schwere Feldhaubitze M 94
Type	Heavy howitzer
Place of origin	Austria-Hungary
Service history
In service	1894–1918
Used by	Austria-Hungary
Wars	World War I
Production history
Designed	1891–1894
Variants	M 94/4, M 99, M 99/4
Specifications
Shell	separate-loading, bagged charge
Caliber	149 millimetres (5.9 in)
Breech	Horizontal flat wedge
Recoil	none
Carriage	Box trail
Traverse	none
Maximum firing range	approximately 6,000 metres (6,600 yd)

The 15 cm schwere Feldhaubitze M 94 was a heavy howitzer used by Austria-Hungary in World War I. It had a bronze barrel and relied on wheel ramps to absorb its recoil. The barrel was modified in 1899 as the M 99 and can be identified by its octagonal shape. Both howitzers could be mounted on a wide variety of carriages to suit their mission, including a carriage only 1.13 metres (44 in) wide for mountain use. Around the start of the 20th century both the M 94 and M 99 were modified to increase their elevation up to 65°. The elevation arc had to be extended and the trunnion mounts and wheels had to be strengthened to withstand the greater recoil forces when firing at high elevation. They were known as the M 94/4 and the M 99/4 after modification.^[1][2]

• 
  A M94 with its round breech.
• 
  A M99 with its octagonal breech.

• Ortner, M. Christian. The Austro-Hungarian Artillery From 1867 to 1918: Technology, Organization, and Tactics. Vienna, Verlag Militaria, 2007 ISBN 978-3-902526-13-7

• BL 6 inch 30 cwt howitzer : British equivalent
• 152 mm howitzer M1910 : French/Russian equivalent