Seeing that Krebs built .223 UF in marketplace few days ago reminded me of this kit I had on the shelf. Unfired before demill, Virgin and 100% numbers matching
It'll take some tinkering around with the mag latch to get the magazine to fit properly. As you know, this aids in the cycling issues found with these particular parts kits and receivers. I believe I have the build instructions from Nodak highlighting this subject somewhere or another. I just have to find it.