Finally got this thing up and running over the weekend. New BCG, new Gas block and new handguard. Once I got the gas block dialed in it ran 100%. The handguard never got too hot to hold even with the flash-can under it. but doing mag dump after mag dump it will get hot. I did 1 30rd mag dump to see and I could feel the heat starting to rise in my hand but never got too hot. all in all I'm very pleased, onto the next project...AR10!!!!
Thanks again everyone for your help!