I've been looking at Larue and Daniel Defense, but seeing as how I'm deployed to the always lovely Northern Iraq I can't really talk to people / see for myself the advantages and disadvantages to each. I already have a Larue low profile gas block and I was wondering if the Daniel Defense would fit over that. Im looking to have the gas block barely stick out from underneath the hand guard. The rifle is also already complete in basic AR15 form with regular handguards and whatnot. From what I've been reading Larue's rails are a bit on the heavy side. Does anyone have any suggestions? Also this rifle has the potential to be used for a variety of things.