There are three main operational Abrams versions, the M1, M1A1, and M1A2, with each new iteration seeing improvements in armament, protection, and electronics. The M1 Abrams was developed from the failed MBT-70 project that intended to replace the obsolete M60 tank. Initial models of the M1 were armed with a 105 mm M68 gun, while later variants feature a license-produced Rheinmetall 120 mm L/44 designated M256. Conceived for modern armored ground warfare and now one of the heaviest tanks in service at nearly 68 short tons (62 metric tons), it introduced several modern technologies to US armored forces, including a multifuel turbine engine, sophisticated Chobham composite armor, a computer fire control system, separate ammunition storage in a blowout compartment, and NBC protection for crew safety.

The M1 Abrams ( / ˈ eɪ b r ə m z/) is a third-generation American main battle tank designed by Chrysler Defense (now General Dynamics Land Systems) and named for General Creighton Abrams. US$6.21 million (M1A2 / FY99) Estimated in 2016 as US$8.92 million (with inflation adjustment) Chrysler Defense (now General Dynamics Land Systems)

Modern american light tank