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dropping the Mag. S&W M&P 40

Discussion in 'Handguns: Autoloaders' started by nology145, Mar 21, 2013.

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  1. nology145

    nology145 Member

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    I have an issue I purchased a stormlake barrel .40 cal with 2 ports at the end of the barrel everytime i shoot it the mag drops out with that barrel now when i try my factory barrel it works fine no problems of any kind what would cause that i have several stormlake barrels for my glock's and they work fine i purchased the S&W M&P 40 in 2006 my mind is boggled.
     
  2. tarosean

    tarosean Member

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    Is the feed ramp touching the mag?
     
  3. nology145

    nology145 Member

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    only if the slide is back and the barrel moves back and forth when i cock the gun back when i move it foward the barrel moves foward just a hair the factory barrel does the same thing
     
  4. Bovice

    Bovice Member

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    Is the mag able to fully seat with that barrel in?

    Put the mag all the way in, and tug a little at the baseplate to see if it moves back out. If it isn't fully seated, you'll be able to pull the magazine back out.
     
  5. nology145

    nology145 Member

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    tried several times mag does not pull out at all
     
  6. hammerklavier

    hammerklavier Member

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    A ported barrel, shouldn't the slide have cutouts for the ported area? If not, maybe blowback of gasses knocks out mag.
     
  7. nology145

    nology145 Member

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    just had my father shoot it it did the same for him i really think it is the barrel
     
  8. nology145

    nology145 Member

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    no the barrel is extended instead of 4 1/4 it is 4.9 with the 2 ports at the end
     
  9. Bovice

    Bovice Member

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    My guess is that the feed ramp is is slamming back into your magazine. Do the mags have any unusual marks near the top-front?
     
  10. nology145

    nology145 Member

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    here is two pics.
     

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  11. wally

    wally Member

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    Photos are too small to see anything that might be wrong.
     
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