This is a Allen Backpack known as the Lite Force Tactical, model 10854.
The Lite Force Tactical Sling Pack's sling design gives access to the pack without having to remove it. Conceal carry compatible and hydration ready" this pack has a 1200 cubic inch capacity" MOLLE system loops" a large main compression strap" and water bottle and sunglasses pockets. Made with rugged Endura fabric" this sling also has a padded carry handle and a padded adjustable single sling strap. Dimensions: 18" x 9.75" x 7.5".
Features:
Conceal Carry Compatible
Adjustable Sling Strap
MOLLE System Loops