IDK? But do you have the 9mm bolt ?
I have the complete rifle....it will feed 3 rnds and then fails to eject....yes its a 9mm bolt...9mm barrel...9mm carbine...I,m in Spanish Fort,Al.
I've owned 2 9mm carbines in the AR configuration and never had anything but problems. I got a Ruger PC Carbine and never looked back, great running guns. That being said I hope you get yours working, nothing more aggravating then a gun that gives you trouble and we've all had some. Good luck.