Politico writes about this, citing sources.
According to the publication, the version of the M1A2 tanks is more advanced than the old A1 model, which is stored in warehouses.
But the 31 tanks planned for Ukraine will not include the secret weaponry that makes the latest version so lethal.
Earlier, US President Joe Biden confirmed that Washington would transfer 31 M1 Abrams tanks to Kyiv.
At the same time, US Deputy Secretary of State Victoria Nuland said that the US would not have time to send the Abrams tanks promised to Ukraine in time for the spring counteroffensive.