Goblin
Overview
I was asked to design a single shot shell pistol- the prompt was "Half a Booster with Silly Shells". So I did! Goblin uses the same plunger tube, plunger geometry, and draw as Rush, so while it's approximately the size and has the same application as Sillybutt's Wildstyle, it packs more of a punch. It can take any Silly Shell, and performs fantastically.
There's also a Target Goblin variant, with single and three shot inline varieties. It's very much a hand cannon. With the "sniper" Silly Shell, or the singled Target variety, Goblin can hit up to 220 FPS. It's best used, in my opinion, with a triple dart shell whilst rushing doorways and critical points. It's very hard to miss like that.