The Hero's Ring

"Activate form 8: Shield!"
What seemed to be a ring miraculously expands wide enough to deflect incoming bullets away from our hero's body. The chase has just started and bullets are fired already, "What kind of a criminal are you?" the hero complains.
Fight fire with fire!
"Activate form 2: Dual Guns!"
The ring splits in half and reforms into two pistols. Without delay, a rain of bullets showers the criminal's surroundings, terrifying him to surrender.
The chosen wielders of the "Polymorph" can use this gadget to bring their creations to existence; to balance the odds between good and evil.