An invasive, distal component of an argon-enhanced electrosurgical system intended to deliver electrosurgical current within a stream of argon (Ar) gas directly to tissues for cutting/coagulation/ablation during an endoscopic (including laparoscopic, arthroscopic) surgical procedure. It is a long thin device with no controls, typically designed as a coaxial arrangement of a monopolar electrode within an Ar gas delivery tube/sleeve, which requires a patient contact return electrode to complete the circuit. It is available in a variety of forms (e.g., rigid laparoscopic electrode, flexible endoscopic probe). This is a reusable device.