11 lbs. completely assembled. frame, shelf, shoulder straps and pads, waist belt and pad. Can comfortably handle up to 100 lbs of freight.
And a modern hunting pack can carry that much weight on 5 lbs.
I have used an external pack and the whole setup is heavy and awkward while actually hunting. They get hung up in brush and just don’t move well with you. They have a place as a cheap come back for it pack for elk or moose quarters but for antelope I’d rather use a Jansport because the weight is low.