Fostech Echo AK Binary TriggerThe Fostech Echo AK Binary Trigger is designed to bring rapid fire capability to stamped receiver AK rifles and pistols. Featuring three modes of operationSafe, Semi Automatic, and Echothis binary trigger fires one round on the pull and another on the release of the trigger. Built with high quality materials to ensure durability and reliability under heavy use, it enhances the versatility of your AK platform while maintaining safety standards.