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-   -   S&w mp 15-22 upper swap? (http://www.firearmstalk.com/forums/f21/s-w-mp-15-22-upper-swap-82798/)

takeoffyourpantsandjacket 01-29-2013 06:39 PM

S&w mp 15-22 upper swap?
 
can you put a 5.56 m&p 15 upper on the 15-22 lower?plz help if you can...

Sniper03 01-29-2013 09:14 PM

No Sir~ Dimensional differences in the upper and lower receivers. In the case of the 15-22 it also has a polymer receiver not aluminum. But S&W changed dimensions to prevent that from happening as far as I know!

03

longunner 01-29-2013 10:56 PM

So what about putting a 9mm or .22 upper on say a new frontier armory lower?

GeneralPatton 01-31-2013 03:41 PM

Quote:

Originally Posted by TNARG (Post 1115513)
So what about putting a 9mm or .22 upper on say a new frontier armory lower?

I have an ATI .22 tactical upper on a new NFA lower.
The S&W 15-22 upper fits on NFA lower, however the mag seems loose.
http://i10.photobucket.com/albums/a1...psde68d055.jpg
The ATI .22 doesn't fit on the mp15-22 lower

Curlyjoe_99 01-31-2013 04:35 PM

As far as I know it takes a true 5.56 with a 22lr conversion to do what you are asking. Not the 22LR's as the majority of them are custom machined for the 22LR. Find a smitty/machinist to test your theory. I'm betting a lot of modifications will be required.


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