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S&W M&P12-22 lower take ar57 upper?

Discussion in 'Rifle Country' started by Shamus MacD, Jun 6, 2011.

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  1. Shamus MacD

    Shamus MacD Member

    Joined:
    Mar 27, 2011
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    Location:
    Maine
    just curious if they're compatible. the upper will only use the magwell as an ejector port right? any feedback would be helpful
     
  2. gotzero

    gotzero Member

    Joined:
    Oct 18, 2010
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    42
    The pins on mine are spaced differently than AR-15 lowers.
     
  3. trueg50

    trueg50 Member

    Joined:
    May 13, 2007
    Messages:
    265
    Location:
    Vermont
    No.

    The M&P 15-22 does not have a buffer tube for the bolt to recoil into. Due to this S&W intentionally designed the 15-22 to not accept AR-15 lowers/uppers so as to prevent catastrophic damage to the firearm/harm to the user.
     
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