Thanks for the heads up!
That's a very interesting version of the Expanse M4 carbine, the barrel probably have a high chance of being chrome lined.
I also noticed from GB that they have them in 4 different receiver colors, black, OD green, gray and FDE, very cool.
It seems from the ads they're Davidson's distributor exclusive, and one good thing about them (my local gun shop where I buy my Colt carbines gets theirs from Davidson's) is their lifetime guarantee, if you're not happy with your Colt they'll fix it or exchange it within 2 to 3 days if the gun is in stock.
I've got an early 2016 version of the Expanse CE1000 (without forward assist & dust cover) that I bought last March, I added the forward assist and dust cover and other various non Colt parts, I'm mainly using my Expanse lower half with my older (made in 2011) Sporter M4 Carbine upper half, so far so good, I'm very happy with my improved Expanse lower half.
If I could get a hold of those pinned 14.5" Expanse upper half later on, it would be a nice upper or spare upper to have.