My full size custom proton pack I made to complete my costume. Got it as close as I could with what I had. Plan on adding some sound effects at some point. :
Party City Ghostbusters Halloween Costume with Proton Pack for Children Small with Jumpsuit and Backpack on OnBuy
Ghostbusters Proton Pack DIY
Ghostbusters Proton Pack replica gets an updated release date, first details on scale - Ghostbusters News
Costume Replica Ghostbusters Proton Pack
Fun.com: Proton Pack Costume Replica | Ghostbusters Wiki | Fandom
Ghostbusters Proton Pack replica gets an updated release date, first details on scale - Ghostbusters News
Egon Spengler from ghostbusters proton pack build : r/cosplayprops