Well I have most of the parts I need to put it together but need to milk out my 80% lower. But I did get my Ammo today and put my upper on my colt lower and test fired it. Shot 4 rounds total and after the first 2 the second round failed to eject fully I think it could have been the magazine cause the next two went through fine. They have a lot of thump to them after those 4 rounds I’m feeling it a little in my shoulder. I was firing without sights and I think I might of hit the metal pipe we hang our targets off of. If it was from me the holes left from it I could easily fit my thumb through. Overall I really like it, just need to find time to mill out that lower now and put it together.