Lets Talk Gundam but he doesn't have COVID anymore on Twitter: "A Beam Gun was also avalible, codenamed the BOWA BG-M-79f-3A. It is the testbed between the Beam Rifle and Spray Gun.
GK Tactical 3D Print Gundam RGM-79 BR-M-79C-1 Beam Spray Gun Conversion Kit for Action Army AAP-01 | RedWolf