James of O'Neill Ops runs his G4 Operator
pack because he carries the most gear (camera equipment and e-caller alone take a lot of space) but the rest of the team carries either the G2 which is big enough for me to carry ANYTHING I need when calling solo, but when we take the field as a team...the rest of us usually carry the X3 LoDrag.
Simply using it as a rifle scabbard is reason enough, but packing some extra camo, a ghillie, ammo, water, bipod, etc etc etc....the X3 is my personal favorite.
Do yourself a favor and don't believe that just because you've been doing it one way forever, that it's the best way. Test test test, cause I can guarantee...there are always ways to make what you're doing easier.