My range safety officer built his AR with mainly DPMS parts. No complaints thus far, in fact, I have shot it, accurate shooter. They are so modular, you can pretty much do what you want, but if you want to grab something out of a box and run with it, I'd say it's a good buy. Check out their service and reviews online before picking one up though, in case you can drop a couple hundred more and get something from Windham Weaponry for instance.