9L conversion - MP-Pistol Forum

9L conversion

This is a discussion on 9L conversion within the MP Gunsmithing forums, part of the Smith & Wesson MP Forum category; Hello everyone, I just bought a 9L slide along with a 5" KKM barrel for the purpose of converting my full 9. However, Am having ...

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Old September 11th, 2015, 02:02 PM   #1
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9L conversion

Hello everyone, I just bought a 9L slide along with a 5" KKM barrel for the purpose of converting my full 9. However, Am having a feeding problem. Can anyone help me solve this problem? Thank you.
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Old September 11th, 2015, 08:26 PM   #2
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Can you be a little more specific? There are several factors that can cause feeding issues, anything from dwell (especially possible with 3 parts that have never been assembled into a single weapon) to spring selection, even ammo fitment.

Last edited by KRWeiss; September 11th, 2015 at 08:28 PM.
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Old September 14th, 2015, 05:20 PM   #3
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If your feeding problem is failing to cycle a new round in the chamber after a shot have you tried just loading one round in a mag and see if the slide locks open when shot? That may give you your answer... I havent done my research on this conversion and am only on my phone right now but wouldnt you need to swap the guide rod and spring? Or atleast the spring? Sorry if I sound retarded but Im new to the M&P community and havent researched everything yet
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Old May 9th, 2016, 01:27 PM   #4
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If you look closely at the muzzle end of the 5" slide you will see that the guide rod recoil spring socket is set back from the front of the slide-recessed- not sure if it uses the same recoil guide rod of the 4.25 length.
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Old September 12th, 2016, 02:55 PM   #5
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I've replaced all components that were mentioned, however the feeding problem continues. I have replaced the following: springs, guide rod, tried all the different types of 9mm ammo.
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Old September 25th, 2016, 10:09 AM   #6
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Sounds like a barrel issue. More particularly, the chamber and feed ramp. Contact KKM.
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Old October 14th, 2016, 06:17 AM   #7
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What ammo are you using (??????)
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Old October 20th, 2016, 07:22 AM   #8
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The guide rod and spring is the same in a full size & 5", so that's not the problem. What exactly is happening when you say "feeding problem"? Is the cartridge not being fully pushed into battery? Are you getting double feeds? Is the shell casing not getting extracted? Is it firing a cartridge fully functional at all?
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