AIM screen name: uncblue2412
I've owned almost every gun there is possible to own at one point or another, or if I haven't owned them I've had them in my hands for a trade or sale. So pretty much any gun.
Hoppers: Reloader B's and Halo's, Revvys
Barrels: I'm not sure what you'd need with barrels besides suggestions on what and where to buy, in which case I may be a bit biased.
But yeah..I'm in KUSACHAT alot with chubby, Tim, and a few others so that would be the best place to get an answer in real-time..