The Nuclear Option

The Nuclear Option is a Hardmode accessory that can be purchased from the Cyborg. When equipped, it causes every fifth rocket fired by a launcher to be replaced with a radioactive missile, overriding the original rocket's effect. The radioactive missile's damage and knockback is double the replaced rocket, and inflicts the Cursed Inferno debuff for 5 seconds on hit.

Trivia

 * This item is a reference to "The Nuclear Option" quest from Fallout 4.