[99monguse]

My wife wants me to buy a 9mm upper but isn't there more to it then just swapping out the upper and the mag adapter?

 

[Wrecked]

This one seems to come with everything needed for the conversion. At least according to the description.

http://www.midwayusa.com/product/16...l-1-in-14-twiste-matte-with-32-round-magazine

 

[locutus]

ooooops.!!!!!!!!!

 

[robocop10mm]

High Standard manufacturing in Houston makes them. Upper, mag block and a very heavy buffer are all that is needed. The standard carbine buffer is 3 oz. I run a 6 oz 9mm buffer in mine. Midwayusa generally stocks them.