Super short 1911's can have functional issues. I don't own a super shorty, only a 4", and I've only experience one problematic Para 1911 stubby, so I can't really speak to the reliability. I do know they tend to have more issue.
Kimber had some stumbles with the external extractors. I think they got all the problems fixed, but due to market pressure they are moving back to internal extractors.
For ME, I don't have an issue with internal -vs- external. I have 2 kimbers with internal, 3 with external. They all work great. Lot's of guns, even the vaunted glocks, use external extractors. Properly designed, they are less prone to problems than the internal, which relies on proper bending and flexing to work correctly.
However, the die hards 1911 guys love the internal, hence the move back to it.
AFA being concerned, like ANY gun - wring it out yourself, and see how she runs.
i have that very gun in blue,black really.mine has the internal extractor.whatever works imho.i love it.it was sidlined for awile .the mag lock/release broke and lost.finally,finally today i stopped by the local GUN SMITH.27 bucks and 5 minuts im back in action.the mag lock are MIM made.not sure if that was the problem at any rate a cheap quike fix.