It is a duffel bag that has back pack straps, a large main compartment, side compartments, and a separate bottom compartment that looks like it will fit a broken down AR, or a SBR. I think I may sow in some Velcro straps to secure it in place.
Thought I would share with you guys.
http://www.highsierrasport.com/Item?number=7164&lang=en
sorry for the broken link, here is the mfg website, amazon.com is where i got it, they have more pictures.
Looks pretty good for 50 bucks, I am really excited to get it in the mail, once I do I will post some of my opinions and pictures to give an idea of relative size.
Ed