Flower Bullets

Flower Bullets are a type of bullet developed using Vegapunk's GP Flower technology. They are used by Hibari.

Overview
Flower Bullets are bullets presumably developed by the Marines. They utilize Vegapunk's GP Flower technology to transform the gunpowder surrounding their impact into flowers, neutralizing enemy gunmen.

Thus far, they have only been used by Hibari, during SWORD's raid on Hachinosu.