I'm having serious heat issues with my 7.5" upper. Current rail is a copy of YHM's old "light weight" free float. I run a suppressor with this upper, so the inside diameter needs to be larger than 1.5". But I have small hands so I really don't want a monster rail.
Only rail I've found that has an ID of 1.56" is Rainier Arms Evolution rail, but I don't know if the heat issue will be resolved with this.
Any other suggestions? Ideas?