Grey Ghost Gear's Stealth Operator Packs have proven to be very popular - they tend to sell out very quickly after a restock. Now the packs, designed as "low vis recce pack", are available in Kryptek patterns. The packs are built around a large main compartment with a center zip and an updated internal storage panel to carry rifle mags, zippered lower pocket, grab handle, sternum strap and hydration pocket. They're build of 500 Denier Cordura, with measurements as follows: 887.5 cubic inch volume, 17 3/4 inch length, 10 inch width, 5 inch depth.
Here's a great video look at one (photographs and write-up at http://g3blog.com/?p=2718)
The Kryptek packs are on line at: http://www.greyghostgear.com/packs?Page=2&Items=12