9mm to .40 conversion?
So after doing some reading, I've found that the extractors for .40 & 9mm are the same, springs are apparently the same... So if one was to get a hold of a 9mm factory barrel & 9mm magazines (haha), would it theoretically function just as good in a .40 slide & frame as a factory 9mm? What am I missing here?
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Last edited by DocSunShine; 08-14-2013 at 07:07 PM.
Reason: new spin on the question
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