The Byrna SD (Self Defense) is the successor of the Byrna HD. It has been re-engineered for optimal performance. Powered by compressed air (CO2), the Byrna SD shoots .68 caliber round kinetic and/or chemical irritant projectiles that can disable a threat from up to 60-feet away. It is an incredibly powerful and non-lethal self-defense weapon. FeaturesUp to 300 feet per second (204 MPH) projectile speedErgonomic honeycomb grip for better control in all conditionsImproved sights for faster target acquisitionStraight trigger with a 6.5 lb. trigger pull weight on the second shot and smoother pressAmbidextrous safe/fire switch that allows for easy toggling for both left-handed and right-handed individuals IncludedProtective carrying caseOne (1) Byrna SD LauncherTwo (2) 5-Round MagazinesTwo (2) Byrna 8-Gram CO2 CylindersOne (1) 5-Round Tube of Byrna Kinetic ProjectilesOne (1) 5-Round Tube of Byrna Eco-Kinetic ProjectilesOne (1) 5-Round Tube of Byrna Pro Training Projectiles