Interestingly, Dvor (optics planet outlet site) had G2 Gunrunners on sale at one time but I haven't seen them on there again.... and a poster on here got me there and I bought one.
I like it just fine. The only difference I can see between the G1 and the G2 is the G2 has double straps for the top cover and some additional pockets inside and the inside compartment is accessable from the front and top.
If you aren't toting a rifle, the bottom rolls up and tucks inside the pack and straps so the tailpiece (that sticks down) isn't sticking down.
I can easly fit my 338 with magazine attached and scope inside the pouch, the issue is that the barrel (or butt) sticks up quite a ways, not good for woods work but my shorter barreled 308 rides just fine. Mine also came with a top cover for the rifle compartment but I leave that at home and use the elastic raincober.
The G2 has sleeves on both sides of the inner compartment for hydration bottles and slits on each side for the hoses. I just carry bottled water in them.
I think the full capacity is around 2200 cubic inches.
For me, it's ideal. I can cinch it down and make it compact for just carrying my rifle and some snaks for a day trip or I can load it up for a longer trip.
I recommend the raincover, the one thats reversible (orange/camo) for states that require hunter orange.
Len has them in his Long Range store on this site btw..... Hope that helps.
Its made offshore BTW. All the stuff (Eberlestock