Alex's Caves (a new FANTASTIC mod made by the amazing sbom_xela) adds a Raygun item in within its own Toxic Caves.
Crafting it gives you an achievement 'Revive me I have the Ray gun' that pokes fun at the items inspiration from Treyarch and its own Call of Duty: Zombies weapon of the same name.
This resource pack simply makes the Raygun item resemble the COD:Z weapon even more, as well as changing some sound effects.