CMMG Guard upper on 5.56 lower with Glock adapter?

[2Xalpha]

Hello, I'm interested in building a 9 mm AR for PCC using a 5.56 lower and Glock mags. I've looked at the Stern Defense MAG-AD9 and the CMMG Guard bolt and barrel kit, have anyone tested if they are compatible?

 

And before anyone mentions it, yes I would have have loved to just get the CMMG Guard lower for simplicity, but due to our gun laws in this country it is not feasible to get anything other than mil-spec 5.56 lowers.

 

Cheers from Europe

Edited April 20, 2018 by 2Xalpha

[bmiller]

You would have to take off the  ejector on the stern block.  I THINK it would work, or at least modified to work.  I have a guard bolt and barrel, my friend has a stern Glock mag block.