Solothurn S-18/1100

Infobox Weapon|is_ranged=yes


caption=
name=Solothurn S-18/100 20 mm Anti-Tank Cannon
type=Large caliber rifle
origin=Switzerland
era=World War II
design_date=
prod_design_date=
serv_design_date=
used_by=flag|Nazi Germany|name=Germany
wars=World War II
spec_type=
caliber=20 mm
part_length=57 inches
cartridge=20 mm x 138 mm
feed=10 rounds
action=automatic
rate=
velocity=850 m/s
weight=
length=85 inches
variants=Solothurn S-18/100, Solothurn S-18/1000
number=
range=

The Solothurn S-18/1100 20 mm Anti-Tank Cannon was a Swiss anti-tank rifle used during the Second World War, and was a variant of the S-18/1000 with modifications for automatic fire. As a result of its large, powerful ammunition the gun had a tremendous recoil, and its size made portability difficult. The Solothurn firearms company was owned by the German firm Rheinmetall, and used the Swiss company to manufacture arms which were prohibited for manufacture by any German firm, to get around arms limitations imposed upon them at the end of the first World War.