factory vs aftermarket barrels?

[GunnyUSMC]

I have two M&Ps the 45 and the 9. I had the APEX Duty carry kit put in my 45. The guns are like night and day. I need to upgrade my 9 now.
Better trigger pull and tighter groups.
https://www.brownells.com/handgun-p...-action-enhancement-components-prod41314.aspx

 

[ATLDave]

Randy Lee from APEX addressed this topic on the S&W Forum sometime last year. Randy designed the Apex barrel for the S&W M&P 1.0. He noticed a difference in SOME M&P 9s and observed no problems with the .40 or .45 versions. (There was a very extended/lengthy discussion there with a lot of technical explanations.) Here's a link, if that's allowed. Jump to about response #23 -- where Randy chimes in and save yourself a lot of reading.

http://smith-wessonforum.com/smith-...sues-do-dwell-time.html?531915=#post139719735
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Wow, thanks for that. Very interesting reading!