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.

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.