Yes, it does.
The heaviest M1 Abrams variant ever built: the CATTB experimental model had a 140 mm smoothbore gun, a heavily armored turret and an upgraded hull based on the M1 chassis. It had a mechanical loading system in the turret bustle, a new engine (approx. 2000 HP) and probably other upgrades, never fielded.
67 years ago on this day the Soviet Red Army broke through the Hungarian frontline along the Don River, effectively destroying the Hungarian Second Army. Of the 200 000 soldiers, more than 85 000 never returned home.