Compare Surefire M4 to Surefire Z2 CombatLight

The M4 is a high-output incandescent flashlight featuring a 2.5-inch Turbohead that produces a tight beam for long-range illumination and special shock isolation to reduce the chance of failure of its lamp from impact or vibration. It uses a precision micro-textured reflector and a SureFire incandescent lamp to produce a smooth, brilliant beam with more than enough power to temporarily blind and disorient an aggressor by impairing his night-adapted vision, or to reach out and illuminate distant objects and areas. Output is either 225 or 350 lumens, depending on which easy-to-install lamp you use-high-output or ultra high-output. The tactically-correct pushbutton tailcap switch provides secure, ergonomic activation control: press for momentary-on, twist for constant-on. High-strength aerospace aluminum body. Mil-Spec hard-anodized for extreme durability. Less

Compact, versatile, and lightweight, the Z2-S CombatLight is equipped with a high-intensity single-output LED and a strobe feature for special tactical or emergency applications. Virutally indestructible, high-efficiency LED emitter maximizes light output and runtime. With no filament to burn out or break, the Z2-S is virtually immune to failure. Tough aerospace aluminum body is Mil-Spec hard andonized for extreme durability. Ergonomic CombatGrip design provides a secure hold in any condition-even for hands that are cold, wet, or gloved. O-ring and gasket seals offer complete weatherproofing. Precision micro-textured reflector produces a smooth, intense beam with significant peripheral light to enhance situational awareness. Coated tempered window resists impact and thermal shock and maximizes light transmission. Less