по второй фотке видно что танк старый......
Гляньте на пикап на заднем фоне.....такие уже не ездят почти...

А вот один из комментов на ютьюбе подтверждающих эту теорию

That is the Advanced Tank Cannon System demonstrator vehicle which was built in late 1980's to test the XM291 140mm main gun as part of the M1 Component Advanced Technology Test Bed (CATTB). Basically a new turret with millimeter wavelength radar, autoloader, and 140mm gun on a standard M1 Abrams hull. Maybe it was being moved for more testing? Looks to have been recently upgraded?