Nice setup. I built an M4 for my son using a Model1 kit. He's never had any problems with it and he shoots it a bunch.
Thats all that matters in the end. Enjoy your AR!very very happy with my purchase!!
i got my upper in from model1 and was very happy with the finish and quality.
i took it out after just oiling down the bolt in some specific places and oiling down the buffer spring.
put 80 rounds though it without a hic-up.
very very happy with my purchase!!