Busy now but I can post pics later. I have several I'm building, more for fun than any specific purpose. Currently have 9.5" and 15" Combat Series handguards as well as 10.3, 11.5, and 16 inch barrels. Note that Expo has two types of rails; the Patrol Series and Combat Series. Only the Combat Series is CMT sourced. The Patrol Series is from a different manufacturer.
I also have a CMT UHPR-13.7 Mod 1 HDX rail, so I've been able to compare the Expo Combat Series against it. Will post more tonight.