The link to the a bit pixelated gun is here: https://imgur.com/vKFgNS5. Im sorry if it's bad, I'm not a good artist. (First gun)/(on pixlr)
This gun creates a scientific reaction when mixing positively charged ions with negatively charged ions, duplitcating the amount of electric ions, hence it's name. When the first two groups of ions reaches it's limit, it creates double the amount. Every round the projectiles split, the damage drastically goes down. This goes on to the third round. The fire rate is very slow and the damage isn't much better, but the amount of projectiles and range is excellent.