Maxpedition Sitka Gearslinger Black
http://www.amazon.com/gp/product/B0027ZZS8K?tag=sukses2015-20
Single shoulder backpack designed to maximize utility when rotated towards front of body
Shoulder strap designed to go over left shoulder for better weapon shouldering
Bag can be worn in front and contents comfortably accessed while sitting down
Main compartment 15 x 8 x 3-Inch high x wide x thick with internal organization
Top front compartment measures 75 x 2 x 4-Inch wide x thick x high