What size cannon is on the Abrams tank?

120 mm

M1 Abrams
Height	8 ft (2.44 m)
Crew	4 (commander/machine gunner, gunner, loader, driver)
Armor	composite armor
Main armament	M1: 105 mm L/52 M68A1 rifled gun (55 rounds) M1A1: 120 mm L/44 M256A1 smoothbore gun (40 rounds) M1A2: 120 mm L/44 M256A1 smoothbore gun (42 rounds)

How many Abrams does the U.S. have?

The U.S. Army has 6,000 M1 Abrams tanks and for years has been saying that it doesn’t need any more, but the service is requesting $558 million for more tanks in the latest budget.

What will replace the Leopard 2?

The Main Ground Combat System (MGCS) is a project by France and Germany since 2012 to replace their currently deployed Leclerc and Leopard 2 main battle tanks (MBTs).

Why doesn’t the US upgrade their Abrams tank to the L/55?

The Germans developed the L/55 gun after that to give their Leopard 2A6 (and later A7+) a better firepower. The US does not feel the need to upgrade their Abrams because all wars they fought after the cold war were against inferior opponents who did not possess tanks better than T-72S.

Why is the US Army still building the Abrams?

Until a revolution in materials is realized, the Army needs to exploit the potential resident in the Abrams. The U.S. Army is on an intensive quest for an array of new technologies with which to design and build new armored fighting vehicles, particularly a replacement for the long-serving Bradley.

What should the Army do with the M1A3 Abrams?

The Army should initiate auto-loader turret R&D funding in Fiscal Year 2021 as the pacing development for an M1A3 upgrade. Second, make the Abrams as much a sensor platform as a shooter. The Abrams A3 version should be the platform for advanced sensors and electronic systems.

How much does the Abrams tank weigh?

With all the new capabilities that have been added, the tank now weighs just shy of 80 tons. The most straightforward way of making the Abrams lighter is to develop an auto-loader turret.