Here we have the BoomSlugga

Among the Orks Six Shoota's are the most basic form of Slugga, Often the first gun a Ork Yoof might get his mits on.
But Stromm Gorefoot a Beastman who grew up in a Digga tribe under ork rule as a pit fighter, took that basic design, and expanded the Six Shoota out to hold 12 heavy rounds, and built that around a wild squig hunters grenade launcher. a heavy hand gun that can punch through a git with no problem, with a bomb capable of taking down a charging hunter squig, and a heavy jagged front that can be used to beat a foe to death if it runs out of rounds.

As I said this started life as Stanley's gun from Dr Stone but I midded the files before I printed it it out, bulking the barrel shroud, and modding the front plat with some spikes and an etended barrel. I mean to finish it up adding some bolt heads to the shroud to make it more slap dash as well as painting the fangs white