The Guardian’s body is machined from aerospace aluminum, features deep grooves and ribbing to enhance purchase, and is Mil-Spec anodized. Activation is by way of a push-button tailcap; depressing the switch enables momentary-on, while twisting the tailcap clockwise results in constant-on mode. An O-Ring and gasket sealing ensure the Guardian is weatherproof. Six SureFire 123A batteries are included. Price: $425.