Group : Large Caliber Cannons
Status : Active
Origin : Germany
Contractor : Rheinmetall Defence
Initial Operational Capability (IOC) : 1979
Total Production : ?

The Rheinmetall 120mm L44 smoothbore gun fires all NATO 120mm standard ammunition and has been designed for integration into main battle tanks (MBTs) such as the Leopard 2 of Germany, M1A1 Abrams of the United States of America, Type 90 of Japan, K1A1 of South Korea and Ariete of Italy. The 120mm L44 is the leading tank gun of its category and is/was manufactured under license in the United States of America and Japan. The gun has been optimized for engagement against heavy armored targets such as MBTs and fortifications. The 120mm L44 entered service along with the Leopard 2 A4 tank in 1979.

Group : Large Caliber Cannons
Status : Active
Also Known As : L55A1
Origin : Germany
Contractor : Rheinmetall Defence
Initial Operational Capability (IOC) : 2001
Total Production : ?

The Rheinmetall 120mm L55 tank gun offers a longer barrel thus providing the greater muzzle velocity/energy compared with existing tank guns even at long-range engagements as well as increased maximum range. The L55 also features optimized barrel material. It fires all 120mm NATO ammunition and is optimized for taking out heavy armored targets such as tanks. The 120mm L55 may have been surpassed by the new Russian 2A82-1M tank gun in 2015. The 120mm L55 gun was introduced along with the Leopard 2 A6 main battle tank in 2001. The gun was selected to provide outstanding firepower to the Republic of Korea's K2 Blank Panther tank.

Group : Large Caliber Cannons
Status : Active
Also Known As : Lightweight Low Recoil
Origin : Germany
Contractor : Rheinmetall Defence
Initial Operational Capability (IOC) : 2007
Total Production : ?

The Rheinmetall 120mm L47 Lightweight Low Recoil (LLR) is a new tank gun evolved from the L44 gun but optimized for integration onto medium armored combat vehicles instead of heavy tanks. It fires all 120mm NATO ammunition and is optimized for taking out heavy armored targets such as tanks. The 120mm L47 gun was introduced in 2006-2007 but did not get any orders.