I was actually tempted to make a gatling gun out of paper like I did with the pistols I'm holding, but I didn't have enough time. Next time, I'll make one. And yes, the guns I am holding in the picture is nothing but paper and glue. I know I can bring airsoft guns to the convention so long as there is no magazine loaded or BBs in the chamber, but I can't afford any airsoft guns at the moment so I have to make do with paper, glue, and whatever I can get my hands on.
Noone uses gatling guns. They shoot slower than revolvers.
I always liked using gatlings ingame. Sure, they fire slower than pistols, but I manage to get max ASPD with them whenever I want to. And the sprite looks cool. A quick note: if you equip a Soldier's Gatling Gun, the sprite will show a rifle instead. It makes you look like you have an assault rifle while you fight.