I see the ambi handle issue this way
1a. If possible, add another slot/cutout to the other side for an alternative bolt group that has the left side charging handle. This is dubious because the external ejector is right around the area where this new handle would be, and even if it doesn't interfere there might be balance issues due to rotation and ejection, etc.
1b. Design a "mirror" gun that's probably has to have its bolt, bolt group and even lug recesses non interchangeable with the original. Not a realistic option in any way.
VS
2. Left-handers accept charging with their non-trigger hand and the slight discomfort of looking at an ejection that will never hit them. The magazine and and selectors are already ambi.
1a. If possible, add another slot/cutout to the other side for an alternative bolt group that has the left side charging handle. This is dubious because the external ejector is right around the area where this new handle would be, and even if it doesn't interfere there might be balance issues due to rotation and ejection, etc.
1b. Design a "mirror" gun that's probably has to have its bolt, bolt group and even lug recesses non interchangeable with the original. Not a realistic option in any way.
VS
2. Left-handers accept charging with their non-trigger hand and the slight discomfort of looking at an ejection that will never hit them. The magazine and and selectors are already ambi.