Looking at buying an upper from them to put on a new build. Anyone shooting one? I know there are a couple people here that are on their website to promote but are they good? Better than most? I know the barrels are nitride coated. They come with a YHM flashhider and I like the rifle lenth rail they put on them. To top it off the price is really good. Any feed back from someone that has put some rounds down range on these?