Overview
The body of the M3 is made of machined aircraft aluminum which is anodized to military spec. Type III hardness. Inside, the entire light body is coated with a corrosive resistant layer. Checkering is found on the tailcap and the body just behind the head to improve grip. The unusual shape of the body is designed to facilitate using the Rogers-Surefire combat grip when engaging opponents. There are 2 rubber rings near the tail of the light that allow for adjustment of the grip so that the light fits the hand of the user when using the Rogers-Surefire technique.The bezel of the light includes a shock dampening system to allow the lamp to survive repeated impacts arising from the recoil of heavy caliber weapons. It also protects the lamp when the light is dropped on its face. The light comes with two lamps - a 125 Lumen lamp for 1 hour runtime on a set of batteries, and a 225 lumen lamp that runs for about 20 minutes on a set of batteries. Three Surefire 123A batteries are included in the light. The lens is tempered Pyrex
The tailcap contains the switching mechanism. Press the rubber button for momentary use, twist the tailcap for constant-on. The tailcap has witness marks to help indicate the state the switch is in, and the switch can be "locked out" so that accidental activation is prevented. A lanyard attachment ring is just below the tailcap. A lanyard is included. The entire light is sealed with O-rings, making it very water resistant.