Alacarti's Vari-o-Matic variable fire cannon

Alacarti's Vari-o-matic first appears as a metal bracelet. When you attune to it, it automatically adjusts to fit your wrist perfectly, and you gain proficiency with martial weapons. The bracelet has 4 colorful buttons on it. When pressed, each button causes the bracelet to form into a cannon around your hand. The buttons for the other weapons are still there in cannon form, along with a button to revert to bracelet form. The button that was pressed determines the specifics of the cannon. Below is a list of buttons and their cannons. Important Note! in order for Alacarti's Vari-o-Matic to work properly, you MUST also equip an Automatic Rifle (for Machine Gun Mode),  a Hunting Rifle (for Sniper Mode), a Shotgun (for Shotgun Mode), and a Laser Pistol (for Laser Mode).

Red Button: Machine Gun Mode

Blue Button: Sniper Mode

Green Button: Shotgun Mode

Yellow Button: Laser Mode

Black Button: Revert to Bracelet

Switching between modes requires a utilize action, and whenever you switch, you must reload the gun, as each gun has a different size magazine. The Vari-o-Matic can be reloaded as a bonus action.

This is an item I made in a campaign in which I was playing an Artificer. I hope you enjoy it!

Notes: Proficiency: Martial Weapons