 Developed Byrna HD, which dispenses chemical irritants from a handgun-like personal security device Also offers the 40mm Blunt Impact Projectile line of products which use pain compliance to control a target Receives recurring revenue from selling ammunition, cartridges, chemical irritant payloads and training rounds What Byrna Technologies does: Byrna Technologies Inc CSE:BYRN OTCMKTS:BYRN, formerly Security Devices International, is a non-lethal defense technology company that manufactures and sells less-than-lethal security devices and ammunition. The Andover, Massachusetts-based company developed the Byrna HD, a handgun-like device that dispenses chemical irritants. 