DSF-870 Ultra-High Two-Output-Mode LED WeaponLight for Remington 870 Shotguns. Specifications Output / Runtime -- White Light High 600 lumens / 1.5 hours Low 200 lumens / 3.0 hours** Tactical Runtime** 3 .0 hours Bezel Diameter 1 .37 inches Weight w/Batteries 17.8 ounces Batteries 2 = 123A (included) ** Runtime until output drops below 50 lumens. Description: DSF-870 Featuring two levels of tactical illumination, ambidextrous switching, a slender ergonomic design, and legendary SureFire reliability and durability, the DSF-870 is the ultimate WeaponLight for Remington 870 combat shotguns. This compact, lightweight system replaces the weapon’s original factory forend and features a recoil-proof LED that generates 600 lumens of blinding white light at maximum output, or 200 lumens with twice the runtime on its high setting. The LED’s light is focused by a precision reflector to create a smooth, wide beam perfect for closer-range shotgun applications typical in law enforcement and home defense—with enough reach and surround light to properly identify threats and maintain situational awareness. The DSF-870 features large, tactile momentary and constant-on switches on both sides for precise control by left- and right-handed shooters. Selecting the LED’s output is achieved by activating the light in constant-on mode and then pressing the output-mode selector switch until the desired output level (600 or 200 lumens) is set. The selected output can then be left in constant-on mode or switched to momentary activation, and it stays at that output level until reset. Every DSF-Series WeaponLight also features an integrated system-disable switch to prevent accidental activation during transport, storage, or stealth operations. A lightweight but strong aluminum module protects the optics, LED, and sophisticated electronics, minimizing length with side-by-side placement of the two lithium batteries that power the system. The module has a Mil-Spec hard anodized finish to protect against scratches, abrasion, and corrosion, while O-ring and gasket seals keep out moisture, dust, and debris. The slender forend body is made from extremely tough polymer and is textured for a secure hold and features large, tactile momentary and constant-on switching on both sides for precise control by left- and right-handed shooters. The DSF-870 provides unmatched power, versatility, and control, making it a must-have on Remington 870 shotguns used in combat, law enforcement, or home defense. NOTE: To see our other DSF shotgun forend models, click here. Fits: Remington 870 shotgun Features •Virtually indestructible, two-output LED generates 600 lumens of blinding light on its max setting, and 200 lumens with nearly twice the runtime on high •Precision reflector shapes a versatile beam with ample reach and surround light for close- to medium-range applications •Switching—ambidextrous momentary- and constant-on switches on both sides, output-mode-selector switch on left side, system-disable switch on forend bottom •Slender, lightweight, high-impact polymer forend is textured for secure grip •Construction—Mil-Spec hard-anodized aluminum body; coated, tempted window; O-ring & gasket seals for weatherproofing •Includes high-energy 123A batteries with 10-year shelf life •Backed by SureFire’s No-Hassle Promise