Thought I could keep you guys updated with my build and get some help with it in the process. Started off with 553 Eotech and a Surefire M961XM07 So then I ordered a LMT upper with a Knights Armament RAS and YHM front and rear buis. The only issue Im having is if I place the Eotech on the actual reciever rails its too close to the BUIS and if I place it on the KAC RAS then it sits hella forward. The only solution would be to place it in the middle, however, when it tries to straddle over that barrel nut, it hits it, not allowing me to clamp it down. Ill post more pics when other parts come in.