Some time after joining the Chicago Ghostbusters, Ron Alexander invented the Boson Caster and installed it on his own Proton Pack. Ron was forced to test it during an impromptu battle with The Ghost and The Darkness in the Field Museum of Natural History. Forced to shoot it at close range, Ron was able to decapitate one of the Man-Eaters. However, the blast failed to neutralize the entity. During the battle against Vigo on Hart Island, Ron used the Boson Caster on him at point blank range since Ray Stantz was stuck in a trance state and couldn't use the Slime Blower.
During the search for the Map to Nikulausson's Tomb in the Aokigahara Forest, Ron introduced a new addition to his Boson Caster in the presence of the forest's Yurei. It was a modified version of the atomizing stream from his original equipment. He claimed it now safely disrupted a ghost's psychokinetic cohesion on a subatomic level. Ron used the Boson Caster's atomizing stream on the Killer in Black during The Trask Hotel case. The ghost lost its right arm but generated five more.
- The Boson Caster appears to loosely resemble the Predator's Plasma Caster from the Predator movie franchise.
- Ongoing Series
- Volume 2
- Volume 3
- Ghostbusters Annual 2017
- Second City Ghostbusters
- Spectral Incident Report (2016). IDW Comics- "Ghostbusters International #5" (2016) (Comic p.23). Spectral Incident Report reads: "(1) modified proton pack with boson caster."
- Ray Stantz (2019). IDW Comics- "Transformers/Ghostbusters Issue #4" (2019) (Comic p.14). Ray Stantz says: "Even if we'd thought to bring a Boson Caster, this Kremzeek guy has a similar electrical component to the entity you helped us capture the other night."