Byrna Pepper Projectile 25 PKByrna Pepper Projectiles contain a powerful blend of Oleoresin Capsicum (OC) and PAVA making them one of the most effective pepper projectiles available for non lethal personal defense. Designed for use with Byrna SD and Byrna TCR launchers, these projectiles deliver a potent chemical payload on impact that causes immediate physical effects including burning in the throat, wheezing, gasping, shortness of breath, and temporary inability to breathe