Kinda looks like the TAD FASTPACK PS v2. Their two smaller packs, the EDC v4 and Litespeed also have the transporter tail feature. Militarymorons have reviewed all three
here.
They may kick-ass packs and the high cost is completely worth it in my opinion. I have been stopped on the street by total strangers a few times - they wanted to know what kind of backpack I carry (usually the EDC v3 in Foliage Green) and received countless compliments from random people. I've used it daily for over two years and the thing still looks and perfoms like new.