The 25 Liter Drawbridge is Hazard 4’s first pack with a built-in beavertail to carry items you want to get ahold of quickly like helmets, outerwear, etc.
What’s different about their beavertail is that it can rotate down all the way and serve as a pocket for a weapon stock which can be carried vertically on the Drawbridge.
These images from Hazard 4 do a pretty good job of calling out the various other features of the Drawbridge.
Nice pants too.
We see a lot of packs of all kinds on SSD. This one actually interests me with its wide range of features and options. While I don’t plan on finding myself in need of a backpack on “vertical terrain” … I’m thinking this could be an awesome range bag, at the least, and a fantastic B.I.B./B.O.B.