When a character has a [[gun]] or [[cannon]] mounted on their shoulder. Common in long-range use [[mecha]].

Examples include the [[Guncannon]] from [i][[Mobile Suit Gundam]][/i], [[Gundam Double X]] from [i][[After War Gundam X]][/i], [[Doomguy]] in his [[Doom_(2016)|2016]] and [i][[Doom Eternal|Eternal]][/i] appearances, and [[Sideswipe]] from [i][[Transformers]][/i].