The Arex Rex Zero 1S is a reliable, hammer-fired pistol from Slovenia, introduced to the U.S. by FIME Group around 2016-2017, known for its SIG P226-like design but with unique features like ambidextrous controls, a manual safety/decocker, and durable all-metal construction, quickly gaining a following for its quality, accuracy, and value, proving itself through rigorous testing and meeting military reliability standards.