The 1.2 gun models are currently stashed away on the Devs' hard drives to prevent them from being inserted into KoRx or something.
Getting them is easy though. You see, Stannum has no firewall and his entire hard disk is shared.
Simply hack Stannum's computer and steal them, insert them into a modified data-1.1.0.pk3 and play on any supporting server.
I'm running the 1.2 models right now and they look AMAZING. I really hope you take the bit of effort to get them, it's really worth it for anyone to do.