SureFire DSF-500590 Dedicated Shotgun Forend WeaponLight for Mossberg 500590 Shotgunsbr Virtually indestructible ultra-high-output LED generates 600 lumens of blinding light on its max setting and 200 lumens on its high setting br Precision reflector shapes a versatile beam with reach and plenty of surround light for close-quarter applications and beyond br Ergonomic switching output-mode-selector switch momentary- and constant-on switches on both sides system-disable switch on bottom br Slender high-impact polymer forend is textured for secure hold br Mil-Spec hard-anodized aluminum body tempered window O-ring seals make Weapon Light rugged durable and weatherproof