Z2 Combatlight The latest generation of our patented CombatLight, the Z2 is standard issue for the FBI, U.S. Air Marshals, and thousands of police departments worldwide. CNC machined from aerospace-grade aluminum and anodized against corrosion and wear, the Z2 is powered by two lithium batteries (10-year shelf life), and a patented rubber grip ring allows the light to be operated with a handgun using the Rogers/SureFire technique. And, although less than five inches long, the Z2 produces enough light to momentarily blind a resistant or hostile subject whose eyes are dark adapted. The Z2 also features unique switching originally developed for law enforcement– twist for constant on, or depress the tailcap button for momentary illumination or emergency signaling.