The Eberlestock J-34 aka "Just One" is a well thought out design with a great rifle scabbard and has all the adjustment you would want. It can start as a daypack and expand to 4800 cu. inches and even beyond that with an add-on pack.
At 7# 8oz. I find it to be an exceptional pack that I've carried from AK thru WY, CO and NM..
FWIW, the three guides I know in AK all use external framed packs for serious haul- outs in mountain country. They shop at Barneys Sports Chalet in Anchorage.

Choices are always a good thing.

Last edited by bigwhoop; 02/11/16.

My home is the "sanctuary residence" for my firearms.