Originally posted by Zvolen
Colt, without a doubt.
(Mind you I don't think its the best gun upgraded, but you asked biggest difference)
Obviously any of the guns that were good before will be good upgraded and better than a lower gun that's also upgraded. I personally like the Thompson upgraded though.
he's right the colt KICKS ASS@!!!! but its always hard to keep it to when you get the PaP bc i normally get a good gun in the box and have to take it.
but also the ray gun is good, ppsh, mg, browning, mag, and the Kar too, its a one shot kill