Thanks to Costas TT for the pics!
I never knew this tank existed....always been a fan of the M60/M1 hybrid MBT 2000 that was offered for export and I thought the Marine Corps should have jumped on.
Is that a possible future? New turrets on existing hulls? Could we do a "Russian Armata" by creating a crew capsule in the hull of an M1 and developing some reliable, large caliber (140mm), autoloading unmanned turret?