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Discussion Starter · #1 ·
I have a XDm .40 compact with a 9mm conversion barrel and I recently picked up a XDm full size in 9mm. I was at the range and decided to try swapping the slides out with the frames. I had swapped them out at home to see if they fit and cycled and everything seemed identical. I did the quick swap out and I was able to fire off several magazines of 9mm on the .40 frame with no problems at all. It felt like I was cheating or something. I was using 9mm magazines with the sleeves on them so everything felt perfect.

I was wondering if anyone ever put a .40 cal barrel into a 9mm slide? I can't see any difference with the naked eye, they look identical in every dimension but maybe the differences are too small to see.

Anyone with an idea?
 

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Im not sure about the 9 but I swapped the slides on my 5.25 .40 and 3.8 compact .40. Everything worked just fine
 
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