I got my upper and the lower should be here next week along with the mags and BUIS. Now I want to completely tear down the rifle and clean and inspect everything to see how it works. Are there any online guides or a .pdf or something anyone knows of for the AR dissasembly? I just like to tinker and know how stuff works. Standard CAR upper (i like the non m-4 barrel) with M4/R4 hand guards and chrome lined.