So I just ordered one of these... Hope I don't regret it... 10lbs doesn't seem like much. If I remember right, a M16-A2 with a full magazine was close to 9lbs, and I carried that thing for hours upon hours back in basic. Plus, I think my paintball rigs weighed more than that with a full hopper and 68ci tank (maybe the same or close).
If I find it to be too heavy, I guess I'll just go to my car and get a different one... lol...