In Secrets of the Ancients there is a "precursor" weapon called a Fusion Pistol (TL 22) detailed in The Death of Grandfather chapter.

I am currently in the midst of converting Wrath of the Ancients for Fantasy Grounds and in that book there are a few stats (just damage really) for a Fusion Rifle that lots of the Droyne carry, but there is no picture of it in the book, which my OCD really dislikes. I took it upon myself to create one in the 'style' of the Fusion Pistol from the aforementioned book.

Since there are no detailed stats in WotA beyond damage (4D/16D) I figure the range would be similar to what a laser rifle has (400m) or maybe the FGHP (450m).
While working on the fusion rifle, I also created a shorter Fusion "Carbine"::

Since this is just a weapon imagined by me I would follow the same math for shorter range and damage like a laser carbine would have compared to a laser rifle but using the Fusion Rifles damage (4D/16D). So, 3D/12D damage and half the range of the rifle.
These should not be common or anything as they are still Ancient level weapons in the TL 22+ range.
Feel free to use the fusion rifle and fusion carbine as you see fit.

I am currently in the midst of converting Wrath of the Ancients for Fantasy Grounds and in that book there are a few stats (just damage really) for a Fusion Rifle that lots of the Droyne carry, but there is no picture of it in the book, which my OCD really dislikes. I took it upon myself to create one in the 'style' of the Fusion Pistol from the aforementioned book.

Since there are no detailed stats in WotA beyond damage (4D/16D) I figure the range would be similar to what a laser rifle has (400m) or maybe the FGHP (450m).
While working on the fusion rifle, I also created a shorter Fusion "Carbine"::

Since this is just a weapon imagined by me I would follow the same math for shorter range and damage like a laser carbine would have compared to a laser rifle but using the Fusion Rifles damage (4D/16D). So, 3D/12D damage and half the range of the rifle.
These should not be common or anything as they are still Ancient level weapons in the TL 22+ range.
Feel free to use the fusion rifle and fusion carbine as you see fit.