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


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Shamus MacD
June 6, 2011, 08:21 PM
just curious if they're compatible. the upper will only use the magwell as an ejector port right? any feedback would be helpful

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gotzero
June 6, 2011, 09:27 PM
The pins on mine are spaced differently than AR-15 lowers.

trueg50
June 6, 2011, 09:33 PM
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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