Founded in 1981, Combined Systems, Inc. (CSI) is the recognized leader in the design, manufacture, and marketing of security products for the global defense and law enforcement markets. As the premier supplier of less-lethal munitions and launching systems, CSI manufactures products for riot control, police tactical teams, corrections officers, and military units.

CSI is the parent company of brands names Combined Tactical Systems (CTS), Penn Arms, CTS Thompson Handcuffs & Restraints, and CTS Training Institute. Through these brand names, CSI is able to support the needs of its customers in all aspects, including research and development, product support, sales, and training.