Compare Surefire SF72 BB to Surefire M4

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