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AR15.COM
8/29/2016 11:08:56 PM EDT
Have a pc 40 that I put a Kkm 9 conversion barrel in and my extractor is far too loose to hold a 9mm case. What haw others done to fix this? As far as I know they only make one extractor for all calibers.
8/30/2016 11:49:57 PM EDT
[#1]
I do not have this problem with my kkm 40 to 9mm threaded barrel and the PC 40l.  I did have the extractor crack after one of my pistol defense classes.  It definitely had a flaw in the original extractor. I opted to changed the broken one out with an apex extractor and it is definitely tighter than the original extractor.   I went through a carbine class recently and used my 40l as my transition weapon. It didn't hiccup with a bunch of rounds during that class and test firing at the range after several hundred rounds.
9/1/2016 4:27:20 PM EDT
[#2]
I run a factory 9mm barrel in a full size M&P 40.  I get double feeds, even using factory 9mm mags.  That's my only experience.
9/2/2016 12:30:31 AM EDT
[#3]
Thanks for the replies.