The Ghostbusters have a selection of weapons they use each movie. All of them are listed down over here, including the props used in the deleted movies.
Also this thing updates everyday, so if there's something that isn't here and should be, we'll be adding it on later for sure
The proton pack has been used in several trailers, like the one for Ghostbusters 7 (not Last Dance, a trailer was made before Ghostbusters 7 was decided to be Last Dance). For a long time, it was not used in any official movies, until A Verry Merry Christmas (Ghostbusters 3.5), and Ghostbusters 10: United. This is the best gadget in the Ghostbusters Fan Made Franchise, as it can shoot the most powerful beam.
This gun was used by Yash Patel and Abhriaj Choudary in Ghostbusters Fan Made 1 and 4.
The Ghoster is a gun mainly used by Raghu in the Ghostbusters Franchise. This is one of the oldest guns in the Ghostbusters Fan Made Franchise, and made it's appearance in Ghostbusters 1, Ghostbusters 2, Ghostbusters 3, Ghostbusters 5, Ghostbusters 6, Ghostbusters 7 and Ghostbusters 8.
However, the original gun was lost. The original gun had a broken orange handle at the end, which was broken since the start of the Ghostbusters movies. But Raghuvir Bhardwaj explained that the gun was lost after filming of Ghostbusters 6 Fan Made, so he borrowed another gun of the same from Ivaan, since Ivaan happened to have one.
Advik also owned a gun of the same which he never used, so Raghu bought it from Advik. It is said that even that gun might be lost now.
The Ghoster V2 is mainly used by Abeer in the Ghostbusters franchise, though others have used it. Coincidentally, this one also has a broken handle at the back. It can be seen in the image given. The people seen in the Ghostbusters franchise using these are Abeer and Saurish. This gun has been used in Ghostbusters 1, Ghostbusters 5 and Ghostbusters 6.
The G-ROD has been seen twice in the franchise, once in Ghostbusters 2, where it was mainly used, and in Ghostbusters 6, where it was only seen but never used to fight or bust ghosts.
The G-ROD max is the best and latest version of the G-ROD. It has only been used in the deleted movie Ghostbusters 4: The War, but it can be seen held by Viaan and Greg in shots of Ghostbusters 6.
It has mainly been used in one movie, which is Ghostbusters: The Return (5), held by Abhiveer and Ivaan, differing in shots
This is an un-used Ghostbuster gadget that Saurish was seen holding in Ghostbusters 6.
This is a gadget that has never been used to fight or bust ghosts in a final film.
This is the most updated version of the Ghoster yet. It has been seen in only one movie, and has never been used for Ghostbusting, or atleast it's never shown. It was mainly Ivaan's gun. It was last seen destroyed in Ghostbusters 7.
Fun Fact: This is the only gun to ever be destroyed in the franchise, and also the only gun that was first introduced in a movie and was destroyed in the same movie itself.
This was only used in one movie, by one person, who was Yash. It was used in Ghostbusters 3.
Fun Fact - This is the most goofiest gun used in the Ghostbusters Fan Made franchise.