I am selling a black and red proto paintball backpack. It's a few years old but still in awesome condition - no rips or anything like that. It's really convenient to be able to fit all your gear on your back (before getting this I had one of those massive JT roller bags and everything fit well into the much more compact backpack). There's a big old pocket in the back and a smaller one in front, just like most normal backpacks (but with a few nice features like pockets for tools and a headphone cord hole) - the magic is in all the paintball specific straps on the back. The combination of straps allow you to carry a pack, mask, and your marker set-up (complete with tank and hopper) all at the same time.
If youre interested you can reply/pm or (preferably, since I dont check here often) text 585-506-6759