Lil' Dissy is an arcane railgun system developed by the Department of Augury during the Saddle Arabian War. Due to complexities in design, and overall manufacturing expenses, the project was scrapped and only the prototype was ever produced. Unlike normal saddle cannons, it is not worn, but is rather implanted in the body on a bio-mount that connects to the user's Generosity jack.
It was designed to fire magically charged crystal rounds that would produce the same effect as spells. Lozenge and Brass Hinge modify the rounds to also deliver chemical weapons.