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m&ppro barrel in m&pl gun

  1. MP Talk
    I want to convert my M&P40L to shoot 9mm (as well as 40cal). I know that I need 9mm mags and a 40cal to 9mm conversion barrel due to the 40cal extractor. M&P40Pro to 9mm conversion barrels are cheaper and more available than M&P40Lto 9mm conversion barrels. Question: Can I use a M&P40Pro5"...