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BudsGunShop.com - Converting S&W M&P40 to M&P9


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  • Converting S&W M&P40 to M&P9

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    in Hand Gun


  • Can you convert a M&P40 to a M&P9 with just a Storm Lake 9mm barrel change? And 9mm mag change. I have a Storm Lake 9mm barrel and a 9mm mag.
    ALSO - Detroit police M&P40 trade ins. My experience with police is they don't shoot much - maybe 500rds/yr. I shoot 15k rds/yr. By trade in put my barrel and mag in - good to go?


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  • Community Default Avatar
    by - Lifetime Points: 92024
    Chosen as Best Answer
  • William, the Storm Lake Barrel and 9mm Magazine are good to go. Factory M&P 9mm & 40S&W pistols have the same Recoil Spring weight so no worries there.

  • Community Default Avatar
    by - Lifetime Points: 29542
  • Yes William it will work but you will most likely need to also change your recoil spring

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