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Muzzle of a Rheinmetall 120 mm L/55 tank gun on a Spanish Leopard 2E. The Rheinmetall Rh-120 is a 120 mm smoothbore tank gun designed and produced in former West Germany by the Rheinmetall Waffe Munition GmbH company. It was developed in response to Soviet advances in armour technology and development of new armoured threats.
The 120 mm smooth-bore gun G1 has been fitted to the private venture Giat Industries AMX-32, [2] AMX-40 and the Brazilian ENGESA EE-T2 Osório main battle tanks, neither of which entered production. This weapon was previously referred to as the CN120-24 gun.
The MKE 120 mm gun is a Turkish 120 mm 55 caliber smoothbore gun based on the CN08 120 mm gun produced by the Turkish company Mechanical and Chemical Industry Corporation, used on the Turkish Altay tank. [1] The 120-millimeter (4.7 in) gun has a length of 6.6 meters (22 ft).
The CN08 (Cannon 08) is a 120 mm 55-caliber smoothbore tank gun produced by Hyundai WIA.It is incorrectly known as the licensed production of the Rheinmetall Rh-120 L/55, but it was indigenously developed by the Agency for Defense Development and WIA (now Hyundai WIA) from 2003 to 2008 for the XK2 development project started in 1995.
A number of considerations had led the U.S. Army and its contractors to favor the Army's standard M68 105 mm gun over Germany's 120 mm Rheinmetall Rh-120 smoothbore gun for the XM1 Abrams. To begin with, the 105 mm gun was "the smallest, lightest, and least costly gun adequate for the job."
The 120 mm F1 gun fires the same 120×570mm ammunition as the German Rh-120 and American M256 smoothbore guns. The French 120 mm F1 gun is, however, 1 m longer than the L/44 version of the Rh-120, which increases muzzle velocity and armour penetration of APFSDS projectiles; it also gives a longer effective range.
It can be used in two configurations, one in 140 mm and one in 120 mm electrothermal-chemical technology (ETC). [1] The XM291 was the first cannon to incorporate a system that counteracted the vibrations in the barrel caused by the tank moving over terrain, using the dynamically tuned shroud (DTS).
The next generation ammunition, called 120 mm APFSDS-T M829A2, entered service in 1994 and is the armor-piercing ammunition currently being produced by General Dynamics Ordnance and Tactical Systems for the 120 mm M256 gun of M1A1 and M1A2 tanks. It is a technology improvement over the M829A1.