Thanks for the info guys that just the kind of intel I'm looking for. I have shot a lot of pistol in local matches for IPSC, ICORE, Steel Challenge and bowling pins. I've only owned an AR for about 18 months and have never shot 3G competition - but have talked with a lot of friends who do and looked at the local forums. I think it would be a cool thing for my son and I to get into together - starting small and slow at first of course. I thought about popping the scope off my 20" Armalite and working with that, but even without the scope its a 9+ pound gun. Right now I'm just evaluating whether the smart move is to get a new upper or a whole new gun.