In 1985 the new T-72B version entered production, with a new laminate armor protection system; its turret armor, designed primarily to defeat anti-tank missiles, surpassed the T-80B's in protection.  The new barrel weighs 1,347 kg (2,970 lb). Rheinmetall's L/44 tank gun has a caliber of 120 mm, and a length of 44 calibers (5.28 meters (17.3 ft)). Continuously improving the performance of 120mm tank gun and ammunition technology is therefore one of Rheinmetall’s principal tasks.  The new 120 mm gun's ten-year development effort, which had begun in 1964, ended in 1974. Bolté, Philip L.; Iwao Hayashi (1 January 1997).  In 1998, the United States military introduced the M829A2, which has an improved depleted uranium penetrator and composite sabot petals.  The first instance of a larger Soviet tank gun was witnessed on the chassis of a modified T-55 in 1961. , The United States developed its own kinetic energy round using a depleted uranium penetrator known as the M829, followed by improved versions. , A variety of rounds have been developed for Rheinmetall's tank gun. According to IHS Jane’s, Rheinmetall has proposed replacing the rifled L30A1 gun of the British Challenger 2 with the smoothbore L55 120mm gun.  The M829 series centers around the depleted uranium penetrator, designed to penetrate enemy armor through kinetic energy and to shatter inside the turret, doing much damage within the tank.  The M1 Abrams can use the M1028 canister round, which is an anti-personnel/anti-helicopter munition, packed with over 1,000 tungsten balls. By 1990, the L/44 was not considered powerful enough to deal with future Soviet armour, which stimulated an effort by Rheinmetall to develop a better main armament. This test however has been stopped due to the characteristics of the Challenger 2. Rheinmetall's L/44 tank gun has a caliber of 120 mm, and a length of 44 calibers (5.28 meters (17.3 ft)). There are two very good answers here, let me elaborate a little with my experience on the matter as a tanker when the Germans were first deciding on the change. Wishlist (2 mates) Stash (4 mates) Started (0 mates) Nobody. DM11 cartridge on behalf of the German Ministry of Defence. , Poland has introduced a series of projectiles for Rheinmetall's tank gun, including an armor-piercing penetrator target practice round (APFSDS-T-TP), a high-explosive round, and a high-explosive target practice (HE-TP) projectile.  This program grew into the Leopard 2; the first prototype of the new tank was delivered in 1972, equipped with a 105-millimeter (4.1 in) smoothbore main gun. Fogg, William; Robert Horner (1 May 1994). The 120mm M831A1 cartridge is a target practice round that simulates the ballistics of the M830 chemical energy service round. , Rheinmetall's L/44 tank gun has a caliber of 120 mm, and a length of 44 calibers (5.28 meters (17.3 ft)). A variety of rounds have been developed for Rheinmetall's tank gun. Mönch Editorial Group. (1 January 2004). Note: Prices and availability are indications only. The Rheinmetall L/44 (Or M-256 as the Americans put it), was first developed in 1974 when the Cold War was still at its peak and the Berlin Wall hasn’t came down. Center for Technology and National Security Policy. Weighing in at 8.35 kilograms with a 38:1 length to diameter ratio and with a muzzle velocity of 1,750 meters per second (5,700 ft/s), the projectile has an effective engagement range of up to 4,000 meters (4,400 yd). Originally the gun ha…  The new 120 mm gun's ten-year development effort, which had begun in 1964, ended in 1974. The 120 mm Rheinmetall main gun is fully stabilized in both azimuth and elevation, and the WNA-H22 electro-hidraulic gun control system is fitted. Part of this program included the introduction of a longer 120 mm tank gun, a cheaper alternative to a brand new tank gun, increasing the maximum range of the gun by an estimated 1,500 m (1,600 yd). Because of concerns about the inability of the 105-millimeter (4.1 in) L7 tank gun then in use across NATO forces to penetrate new Soviet armor, as proved in German tests on four T-62 Soviet tanks captured by Israel following the June 1967 Six-Day War, Rheinmetall was paid for the development of a new tank gun. Since Rheinmetall currently supplies the L/55 120mm cannon used as the main gun on the M1A2 Abrams (as well as the German Leopard 2, Japan’s Type 90 and Korea’s K1A2), I expect the 130mm to get a serious look as an upgrade for the M1A2, or in the next-generation tank currently being designed under the Next Generation Combat Vehicle—Future Decisive Lethality project, though that … From JDW: At a press briefing in early October 2016, Rheinmetall gave further details of the 120 mm smoothbore armament system that it will … Originally the gun ha…  The United States Armed Forces accepted a new demolition round, called the M908 Obstacle Defeating Round, based on the M830A1 MPAT, but with the proximity fuse replaced by a hardened nose cap. L44.  Despite the introduction of the T-62, in 1969 their T-64 tank was rearmed with a new 125-millimeter (4.9 in) tank gun, while in 1972 Nizhny Tagil began production of the T-72 tank, also armed with the 125-millimeter (4.9 in) gun.  The Soviet decision to increase the power of its tank's main armament had come when, in the early 1960s, an Iranian tank commander defected over the Soviet border in a brand-new M60 Patton tank, which was armed with the 105-millimeter (4.1 in) M68 gun, the US version of the British Royal Ordnance L7. Qty. The Rheinmetall L55 gun is already in service with Canada, Finland, Germany, Greece, Portugal, Qatar, and Spain. Now, a Leopard 2 tank has a Rheinmetall L55 120mm for its tanks gun which has 1,750 m/s (5,700 ft/s) for its velocity.  Both the Spanish Leopard 2E and the Greek Leopard 2HEL, as derivatives of the Leopard 2A6, use the 55 caliber-long tank gun. Due to tank sales, Rheinmetall's L/44 tank gun has been manufactured for other nations.  The M1A1 has also been exported to Australia, while the M1A2 Abrams has been exported to Saudi Arabia and Kuwait.. The gun's barrel weighs 1,190 kilograms (2,620 lb), and on the M1 Abrams the gun mount weighs 3,317 kilograms (7,313 lb), while the new barrel (L/55) is 55 calibers long, 1.30 meters (4.3 ft) longer.The bore evacuator and the gun's thermal sleeve, designed to regulate the temperature of the barrel, are made of glass-reinforced plastic, while the barrel has a chrome lining to increase barrel life.  This variant is unofficially referred to by Abrams tank crews as the "super sabot". Jane's Ammunition Handbook (subscription), Israel Aerospace Industries LAser Homing Anti-Tank (LAHAT) projectile (Israel), Gun-launched guided projectiles, Leopard 2: the world's most advanced main battle tank, "Rheinmetall Ups Tank Firepower with new 130mm Gun – Defense Update", German Rheinmetall works on new 130mm tank gun, "Eurosatory 2016: Rheinmetall lifts the lid on new 130 mm tank gun", Rheinmetall Ups Tank Firepower with new 130mm Gun, https://www.youtube.com/watch?v=J8Sa_q-Lz6g, https://www.armyrecognition.com/defense_news_july_2020_global_security_army_industry/rheinmettall_unveils_new_leopard_tank_mbt_with_130mm_cannon.html, "ATK Specifications: 120mm M829A3 APFSDS-T Ammunition", "Rheinmetall Press Release 17 February 2013", "Army ammunition data sheets artillery ammunition: guns, howitzers, mortars, recoilless rifles, grenade launchers, and artillery fuzes (FSC 1310, 1315, 1320, 1390)", Tanks for the Lesson: Leopards, too, for Canada, http://www.military-today.com/tanks/altay.htm, https://www.c4defence.com/Arsiv/almanya-da%C2%A0leopard-tanklarinin-yarisi-calisamaz-durumda/5158/1, "Firing US 120mm Tank Ammunition in the Leopard 2 Main Battle Tank", Lance-grenade individuel Mle F1 (LGI Mle F1), https://en.wikipedia.org/w/index.php?title=Rheinmetall_Rh-120&oldid=996569895, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, Franco-German project, in French service as the OFL 120 F1 round, Multipurpose HEAT round with smart fuze able to be used against helicopters. Krauss-Maffei was chosen as the contractor, and two prototypes were developed in 1969 and 1970. Chait, Richard; John Lyons and Duncan Long (1 December 2005). The United States developed its own kinetic energy penetrator (KEP) tank round in the form of an Armor-Piercing Fin-Stabilized Discarding-Sabot (APFSDS) round, using a depleted uranium (DU) alloy long-rod penetrator (LRP), designated as the M829, followed by improved versions. This is a set of white metal or photo-etched parts for detailing AFV kits. A variety of ammunition has been developed for use by tanks with guns based on Rheinmetall's original L/44 design. 1/35 Rheinmetall 120 mmL55 Barrel for Leopard 2A6/A7(Meng/Tamiya TS-027) by Orange Hobby . "Critical Technology Events in the Development of the M1 Abrams". Eshel, David (1 January 2003). Although the gun is longer, allowing for a higher 580 MPa (84,122 psi) peak pressure from the propellant, the geometry remains the same, allowing the gun to fire the same ammunition as that fired from the shorter version. Fort Knox, KY: U.S. Armor Center. Compared to the 2700 kg 120 mm gun, the 130 mm has a 1,400 kg (3,100 lb) barrel and an all-up weight of 3000 kg including the recoil system. This gun was retrofitted into German and Dutch Leopard 2s, and chosen as the main gun of the Spanish Leopard 2E, the Greek Leopard 2HEL, and South Korean K2 Black Panther battle tank.  The gun's barrel weighs 1,190 kilograms (2,600 lb), and on the M1 Abrams the gun mount weighs 3,317 kilograms (7,310 lb), while the new barrel (L/55) is 55 calibers long, 1.30 meters (4.3 ft) longer. For example, a long line of armor-piercing discarding sabot (APDS) rounds was developed by Rheinmetall. The barrel weight is 1,190 kg, and a complete gun system weighs 3,780 kg. Military Guns and Ammunition - Rheinmetall improves 120mm L/55 - Not satisfied with developing a new 130mm gun, it seems that Rheinmetall is making some improvements to the 120mm L/55, intended for upgrading German and other current-model Leopards.  For example, at the fighting at Sultan Yakoub, during the 1982 Lebanon War, the Israeli government claimed to have destroyed nine Syrian T-72s with the Merkava main battle tank, armed with an Israeli production version of the American M68 105-millimeter (4.1 in) tank gun (which in turn was based on the British L7). Rheinmetall is developing a new generation APFSDS round featuring a semi-combustible cartridge case, new propellant, and new advanced long rod tungsten penetrator as well as a high-explosive air-bursting munition (HE ABM) based on the 120 mm DM11 HE ABM in parallel with the gun; the cartridges are 30 kg (66 lb) and 1.3 m (4.3 ft) long with, according to the company, the increase of 8% in caliber resulting in 50% more kinetic energy over the 120 mm gun. Production began in 1974, with the first version of the gun, known as the L/44 as it was 44 calibers long, used on the German Leopard 2 tank and soon produced under … , The Israeli Army introduced a new round known as the Laser Homing Anti-Tank (LAHAT) projectile. Furthermore, the missile can be fired by both 105-millimeter (4.1 in) and 120 mm tank guns. The German company is proposing the solution as part of plans to extend the life of the CR2 through the British Army’s Life Extension Programme (LEP).  The T-72 also went through a modernization program in an attempt to bring it up to the standards of the T-80B. The Leopard 2A6 and its longer L/55 main gun have been exported for use by the Canadian Army, and the Netherlands upgraded part of its original fleet of Leopard 2s with the more powerful armament.  The gun's barrel weighs 1,190 kilograms (2,620 lb), and on the M1 Abrams the gun mount weighs 3,317 kilograms (7,313 lb), while the new barrel (L/55) is 55 calibers long, 1.30 meters (4.3 ft) longer.  However, it has been found that the DM12's armor-killing abilities are limited by the lack of blast and fragmentation effects, and that the round is less valuable against lightly armored targets. $18.99 + $4.50 shipping .  The British Army has tested Rheinmetall's longer gun, possibly looking to replace the current L30A1 120 mm L/55 rifled main gun on the Challenger 2. 120mm Rheinmetall operators.png 2,753 × 1,400; 91 KB Bodenstück Rheinmetall 120 mm Glattrohrkanone.jpg 3,264 × 2,448; 3.39 MB M1 Abrams turret alignment.jpg 480 × 487; 57 KB The Rheinmetall 120 mm gun is a smoothbore tank gun designed and produced by the West German Rheinmetall-DeTec AG company, developed in response to Soviet advances in armor technology and development of new armored threats. This includes a series of kinetic energy penetrators, such as the American M829 series, and high explosive anti-tank warheads. , The German government began the development of the Leopard 3, although this was canceled after the fall of the Soviet Union. 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