And in the 70s the Russians had a tank with an autoloader mechanism that sometimes would load the weapons soldier into the breach instead of the intended shell if he got in the way in the cramped area.
I'm not sure how exactly the Soviet autoloader worked, but the US Army declined to add one because of the maintenance of an additional 80-100 parts.
From the cycle time of the Iraqi Soviet built tanks, 20-30 seconds, iirc, it didn't give them any advantage in a real combat situation.
“You know vat ve gonna do nowwwww?”
“Nyet...”
“Unpimp ze tank!”