How close is it to working? Would spacing it out 1/16-1/8" get enough clearance?
Just wondering if we could put 1-2 buffer tube 'plates' between the adapter and receiver, like spacers?
They'd have to be modified slightly to get rid of that little key tab (and probably cut off the lower tab as well to keep from interfering during takedown), but they would have the right ID.
When I get a chance I'll experiment.
I'd have to think that soaking the MRA sets in oil would make them uniform. From the pics I've seen it looks like they show up dry?