Hello! I suggest a very low damage, normal damage, fire-inflicting line for the Antigua, useful mainly for Lockdown.
To give the impression that it's for Lockdown, I'd imagine that the recipes for it would/could be sold by Sullivan.
The gun's main point won't be doing damage, it'll be to start fires. It'd be effective to keep recons visible, and would do PLENTY of fire damage to anyone with a glass cannon loadout.
Because of the low damage and lack of specialized damage, I doubt anyone will use this in the clockworks/missions. Oh well.