The SK-105 Kürassier is an Austrian light tank[4] armed with a rifled 105 mm gun in an oscillating turret.

The SK-105 was developed by Saurer-Werk (now Steyr-Daimler-Puch) to meet the Austrian Army's operational requirements for a mobile anti-tank vehicle.

The hull of the SK-105 is welded steel and is divided into three compartments: driver's at the front, fighting in the centre and the engine at the rear.

Add-on armour on the front part of the chassis and turret is available as an option, which provides protection against 35  mm APDS rounds at a flank arc.

Once the gun is fired the empty cartridge cases are ejected out of the rear of the turret through a trapdoor hinged on the left.

This vehicle is specifically designed for mountainous terrain and has an improved climbing capability compared to heavier main battle tanks.

In 2014, all production and support rights on SK-105 were acquired from General Dynamics Europe Land System (GDELS) by the Belgian company DUMA Engineering Group.

In January 2023, Freddy Versluys, CEO of OIP Sensor Systems, claims to have 112 SK-105s stored in hangars in Tournai, Belgium, "in good condition" and "easily repaired" for potential deployment to Ukraine, but presently unavailable because politicians based in Vienna, Austria, have not so far approved these tanks for re-export.

[7] In 2005, the Argentine Army ordered 9 SK-105 hulls from Austria, which it announced would be retrofitted with the turrets of its surplus AMX-13 tanks.