| Starting in 1988, tanks M1A1 received the packages | | | | place as opposed to cylindrical and rotating like the |
| improved of armor which incorporated the mesh out | | | | CITV. The main armament of the original model M1 |
| of uranium exhausted in their armor in front of the | | | | was the M68A1 105 mm rifled tank gun firing a |
| turret and the hull. The armor reinforced this manner | | | | variety of HEAT, high explosive, white phosphorus |
| resistance appreciably increased of offers towards all | | | | (smoke), and a highly efficient and lethal |
| the types of the armaments anti-tank device, but at | | | | anti-personnel (multiple flechette) round. This gun is a |
| the expense adding the considerable weight to the | | | | license-built version of the British Royal Ordnance L7 |
| tank. First tanks M1A1 to receive this leveling were | | | | gun. |
| tanks posted in Germany, since they were the first | | | | While being a reliable weapon, the 105 mm was |
| line of defense against the Soviet Union. In addition | | | | becoming obsolete in the face of advances in armor |
| to the Abrams' advanced armor, some Abrams, most | | | | technology, which meant that a better tank gun was |
| notably M1A1s of the US Marine Corps, are equipped | | | | needed for the M1. The main armament of the M1A1 |
| with a Missile Countermeasure Device that can | | | | and M1A2 is the M256 120 mm smoothbore gun, |
| detect and jam the guidance systems of laser-guided | | | | designed by Rheinmetall AG of Germany. The M256 is |
| anti-tank guided missiles (ATGM). | | | | a variant of the Rheinmetall 120 mm L/44 gun |
| This device is mounted on the turret roof in front of | | | | manufactured under license in the United States by |
| the Loader's hatch, and can lead some people to | | | | General Dynamics Land Systems Division in their plant |
| mistake Abrams fitted with these devices for the | | | | in Lima, Ohio. It is the same armament carried by the |
| M1A2 version, since the Commander's Independent | | | | German Leopard 2 tank up to the version A5 until |
| Thermal Viewer on the latter is mounted in the same | | | | replaced by the longer L/55 gun in version A6. |
| place, though the MCD is box-shaped and fixed in | | | | |