Thank you for taking the time to take the pics.

1. the quick fix would be to turn it into an innie.

2. Or just shave a little off the front of the outie and a little off the inside of the metal latch so that the latch catches.

Wild card - Will the metal ar latches wear out the plastic cut down outie in option 2?? Will the metal ar latches wear out the innie in option 1?

I think the safest and easiest approach would be option 2 because if it does wear down the plastic you could always turn it into a full innie.

If the innie lip wears out, you can implant a piece of metal to the receiver so it can latch on something.

Did the AR latch operation on the mp charging handle feel and function the same minus the fact that it couldnt make it over the hump?