Noun
An early firearm that required manual ignition through a touch hole.
Synonyms: gonne, handgonne
(US, slang) A very large handgun, often impractically so.
Source: en.wiktionary.orgA highly specialized hand cannon, The Last Word allows players to fan their revolver like a true space-cowboy. Source: Internet
This follows many other users creating exotic weapons from the game, including one user creating the Sunshot hand cannon with a 3D printer back in 2018. Source: Internet