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Discussion Starter · #1 ·
Maybe this is a dumb question,
but I just compared a friend's 9mm 1911 mags with my 45 mags (both metalform) , it appears they are identical on the outside. That makes sense, becasue the frame are pretty standard.

How do they differ on the inside? Is it only the follower and the feed lips, or is a 9mm mag shimmed in some way on the inside?

thank you

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