The Solothurn S-18/1000 Anti-Tank rifle was a Swiss and German 20mm sermi-automatic anti-tank rifle used during the Second World War. It was a variant of the earlier S-18/100 with modifications for a higher muzzle velocity, as well as a larger cartridge size, the 20x138B ammunition. 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, who used the Swiss company to manufacture arms which were prohibited for manufacture by any German firm under arms limitations imposed at the end of the First World War.
In 1940–1941 the US Army considered adopting the Solothurn S-18/1000. The weapon was standardized for limited procurement as 20mm automatic gun T3. In spring 1941 the Solothurn was tested against the .90-cal. T4 automatic gun. Although less powerful, the Solothurn was also less bulky and complicated and was found more suitable for Army use. The plans were to acquire an order of 50 pieces and later to produce the weapon in the US. However, long contract negotiations resulted in abandonment of the planned purchase. Later, a new variant have been designed for automatic use wich become the S-18/1100. The weapon prove ingame to be a excellent anti-tank rifle against light and medium tanks. But also against aircrafts (with some training) and againts infantry, the weapon is an excellent killer! You can choose between AP rounds or HE rounds and the weapon have a bipod wich you also can use with both type off rounds. Sometimes you can find the rifle's with a 2.5X telescopic sight, but they are very rare ingame.