Hello,
We it looks like Handl is finally going to start releasing more of its products from their Mk.17/ Mk.20 improvement program. Of all of them this is the one I have been waiting on to go public. They made a fore rail of really thick CF, that can withstand heat of up to 1000F, and meets all the strength requirements of the CAR-H spec sheet. They are not showing them yet but they have a short and long version as well. There other accessories for this system (EGLM kit and heat sink to name two) and the Magpul MLOK rails still vent heat and drain saltwater.
I have been wanting to talk about this one for a long time but that NDA and all, These are really nice guys.
http://handldefense.com/product/scar-advanced-fore-rail/
from what I understand 20-30 bucks more for the tan coating and low to mid $400's probably ship in NOV?