It’s just and aftermarket upgrade.
General Dynamics designed and sold a remote weapon’s station. An operator in the vehicle fired the 50 cal with a joystick. I don’t know if the Abrams got this upgrade or if it was just for the Stryker. But it drastically reduced the ammo expended; orders of magnitude lower. The operator could kill any target with a three round burst (the minimum, as I recall) without ever being exposed to danger. It was amazingly effective. I hope none of these were given away as they will certainly fall into Russian and Iranian hands. Both are adroit at copying.
This is one of the major things that concerns me. If in fact we send our military back in to harm’s way in Iraq. Imagine cresting a hill in a Humvee, only to find an Abrams tank in front of you and closing...
I’m more worried that they were given a main battle tank, which I believe still had some classified tech.
The Iraqi’s were only fielded the “Monkeymodel” variant. No DU armor or advanced fire control systems.
Regards,