Arcane Silver Hawk

Bonus Damage - You have a +3 bonus to attack and damage rolls made with this magic weapon.

Twin Barrels - This weapon has 2 barrels so when you take the attack action and fire this weapon, it automatically fires a second time. You can do this a total of 3 times before needing to reload.

Arcane Infused - Each shot fired from this firearm has a cantrip attached to it. Therefore you add the damage and effects from 1 cantrip you currently have prepared to the bullets. When you make an attack with this weapon, use your spell attack modifier not the revolver attack modifier.

- The cantrips added to the bullets must only be able to target 1 creature, and be a range spell attack. Spells like Eldritch Blast can be used except all the beams are focused into 1 and attached to the shot. 

Limited Spellcasting - You gain the Firebolt cantrip. In addition, 3 times per long rest you can use your bonus action to charge your Silver Hawk and cast the Fireball spell at your current highest spell level. 

It’s up to you to decide whether a character has proficiency with a firearm. Characters in most D&D worlds wouldn’t have such proficiency. During their downtime, characters can use the training rules in the Player’s Handbook to acquire proficiency, assuming that they have enough ammunition to keep the weapons working while mastering their use.

Notes: Bonus: Magic, Need to be a spell caster with proficiency with firearms , Damage, Combat, Range, Ammunition (Firearms), Reload, Sap