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Old 02-06-2013, 12:23 PM
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stackofhay stackofhay is offline
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Join Date: Dec 2012
Location: North Shore of MA
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Have you measured the width of the barrel hoods of the two barrels? A lot of folks trying this in the full size M&Ps have found that 9mm barrels and mags will work, but accuracy will suffer due to side to side play at lockup due to the 9mm barrel hood being narrower. I am one of these people. I now use a proper conversion barrel in my full size .40.

YMMV
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