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Discussion in 'Black Rifle Forum' started by Carnage, Mar 17, 2010.
I was wondering, if my other uppers will work with the M&P 15-22?
They say the dimensions of the upper were designed to prevent the use of a standard AR upper on a 15-22 lower.
Is that a fact?
if so, too bad, guess spike tactical ST-22 will work with any upper right?
from the 15-22 article
"Also, the interface dimensions of the upper and lower receiver units are intentionally designed at a fraction less than 100 percent of centerfire specifications, as well as shorter overall, to make it impossible for anyone to install a standard AR-15 upper receiver on a polymer M&P15-22 lower receiver, or vice versa. And the upper receiver does not have a forward-assist lever; the straight-blowback action doesn't need one."