9.15 cm leichtes Minenwerfer System Lanz

The 9.15 cm leichtes Minenwerfer System Lanz (Trench mortar) was a light mortar used by Germany and Austria-Hungary in World War I, developed from the 9cm glatter leichter MinenWerfer Mauser by Firma Heinrich Lanz & Co. The tube was made thicker and stronger which allowed for more powerful powder to be used, the breech was beefed up, and the safety pin closing system replaced with a screw locking system. The platform was made stronger and had more room for accessories than the Mauser.^[1][2][3]

9.15 cm leichter Minenwerfer System Lanz
Type	Light trench mortar
Place of origin	German Empire
Service history
In service	1914–1918
Used by	German Empire Austria-Hungary
Wars	World War I
Production history
Designer	Heinrich Lanz
Designed	1914–1915
Produced	1915–1918
Specifications
Mass	114 kilograms (251 lb)
Barrel length	595 millimetres (23.4 in)
Shell	3.8 kilograms (8.4 lb)
Caliber	91.5 mm
Maximum firing range	450 metres (490 yd) (M 14/16)

It was a smooth-bore, breech-loading design that used smokeless propellant. It was chosen by the Austrians as an interim replacement for their 9 cm Minenwerfer M 14, pending development of a superior domestic design, which eventually turned out to be the 9 cm Minenwerfer M 17. The older Austrian design had a prominent firing signature, a less effective bomb and shorter range than the Lanz. Over 500 were ordered with deliveries beginning in April 1917.