SureFire G2Z Combat Light Flash Light has a body made from tough corrosion-proof Nitrolon polymer. This Surefire Flashlight produces a smooth, brilliant, pre-focused tactical-level beam with four times the light of a big two D-cell flashlight. Surefire G2 Z Flashlight is bright enough to temporarily blind and disorient a person by impairing out his night-adapted vision. SureFire developed an ingenious means of gripping and activating a flash light while shooting a hand gun, a vital skill for police officers and military personnel. By stepping down the body diameter and adding a rubber grip ring, Surefire Combatlight Flashlight can be held securely between the fingers and squeezed into the palm of the hand like a hypodermic syringe to activate the tailcap switch, all while maintaining a secure grip on a gun. As it turns out, this CombatGrip feature of Surefire Combat Tactical Lights is perfect for maintaining a secure grip on a flashlight in adverse conditions when the weather is cold, or when your hands are wet, sweaty, muddy, or oily - or all of the above, come to think of it. Light output of Sure Fire G2-Z Combat Light can be nearly doubled with optional Surefire P61 lamp. Patented rubber grip ring allows the light to be operated with a handgun using the Rogers/SureFire technique. Surefire G 2 Z Nitrolon Combatlight Tactical Flashlights are available in black (model G2Z-BK), olive drab green (model G2Z-OD), and tan (model G2Z-TN).