The billet uppers with monolithic rails are nice but the forged Mega upper with something like a Midwest K-Series hand guard will come in several ounces lighter. That is what I just did with an ARP scout barrel, like you trying to stay as lightweight as possible.
Hey also a rifle length guard will actually cover the gas block where the mid length will end just before it on that barrel you bought. You probably know that just making sure you order what you want.
