M900 105mm APFSDS-T round
- Brought into service in 1989
- Designed as a replacement for the M833 round
- Previously fired by the original M1 Abrams tank, which is no longer in service. It is now fired by the Stryker Mobile Gun System
The M900 was designed to be used in the original M1 Abrams tank, as a replacement round for the M833. It was brought into service in 1989, and cannot be used in earlier M60 series tanks because of the force of the recoil.
When the later versions of the Abrams were fitted with a 120mm gun, the US was left with significant stocks of the M900. The introduction of the M1128 Stryker Mobile Gun System in 2005 provided a use for this ammunition. As such, the M900 is not thought to be currently in production, although there have been reports that the US Army's Armament, Research and Development Engineering Centre (ARDEC) and the Armtec Defence Products were developing a combustible cartridge case for the M900.
It is claimed that the M900 is capable of penetrating the frontal armour of all current armour systems, as is the M829, the US' main 120 mm DU round. There may also be an M900A1 updated version of this round in circulation.
As with earlier 105mm rounds, the M900 is in theory capable of being fired from the following guns:
- L7, a rifled British Gun used on the Centurian tank, and also used in the German Leopard 1, Japanese Type 74, Sweedish Stridsvagn 103, Indian T-55A, and the Israeli Merkava. The M68 is actually a US licensed version of the L7. It has been reported that the L7 has also been adapted to fit Soviet built T-54 and T-55 tanks by Israel, Eqypt and Iraq, and Chinese Type 79 tanks.
- Rh 105 smoothbore gun, developed privately by Rheinmetal of Germany, and not known to be fitted to any vehicle. The ammunition designed to work with this gun is a scaled down version of Rheinmetals 120mm rounds, and consists of a high explosive round, and an APFSDS-T round with a tungsten penetrator
- CN105F1, manufactured by Nexter, fitted to the Giat Industries AMX-30 French tank. The AMX-30 has been largely supersceded by the Leclerc
- GT7, manufactured by Denel of South Africa, and fitted to the Rooikat 105 Armoured fighting vehicle