Alex, the Mk 3's are easiest to identify because they incorporate "Mk3" into the Shorty 40 logo on the front right side of the slide. They also, unlike the first and second versions, are available in a black finish as well as a silver one ("Mk3S").
If it's engineering changes you're asking about, now I can't help you with that.
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Ukraine -- now more than ever
Last edited by vigil617; 07-08-2019 at 06:48 AM.
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