The U-SH 405 is a prototype vehicle from the late 1950s based on the Unimog 404 truck chassis, developed by the Landsverk company in collaboration with Daimler-Benz. The prototype was equipped with two 81 mm Oerlikon rocket launchers. Only one prototype was built and tested, but it never got any orders and was abandoned.

The U-SH 405 was introduced in Update 1.97 "Viking Fury". It is a Swedish light tank armed with two 81 mm Oerlikon rocket launchers with a high rate of fire. Given its speed and manoeuvrability, one should always be wary of an U-SH 405 around any corner or flanking around. The U-SH 405 is an excellent vehicle to perform ambushes and hit and run tactics with, due to the high speed and excellent reverse speed making it able to go in and fire at targets then escape from dangerous situations. However, being fast is not always the best, due to the U-SH 405's brakes being near non-existant, it is hard for it to slow down. The twin 81 mm rocket launchers are drum-fed and have a high rate of fire, making it fast to overpower an enemy target with rockets then make a fast escape. Being more of an armoured car than a real light tank, it is vulnerable to autocannons and even heavy machine gun fire.