SureFire KX heads are extended-runtime LED heads with an aerospace-grade aluminum bezel, a virtually indestructible light emitting diode, and a Total Internal Reflection (TIR) lens that creates a bright, tightly focused central beam and enough surround beam to accommodate peripheral vision. A KX head converts a SureFire incandescent E1E, E2E, and E2D flashlight into a longer-running (and higher-output, in the case of the E1E) LED flashlight. It also replaces the less efficient KL LED heads used on older versions of the E1L and E2L Outdoorsman to enable these flashlights to generate more output and significantly more runtime. Durable, O-ring-sealed KX heads install in seconds—simply unscrew and remove the light’s existing head and screw on the new KX head.

The maximum output of the KX1, used on the one-battery E1E and E1L, is 30 lumens. The KX1 produces useful light levels for 10 hours. And because KX heads are weatherproof and solid state, with no filament to burn out or break, they don’t need to be periodically replaced, like an incandescent lamp. The KX1 is available with a hard anodized olive drab finish.

Max Output: 30 lumens

Runtime: 10 hours

Bezel Diameter: 1.0 inch

Length: 1.4 inches

Weight: 0.5 ounces

Power Source: One SureFire 123A lithium battery.

Material: Aerospace-grade aluminum, cyclo-olefin polymer

Finish: Mil-Spec, Type III hard anodized in olive drab