SureFire MasterFire w/Laser 850 Lumens Output Green Laser Universal/Picatinny Rails Mount Black Anodized Aluminum Surefire XH50R Masterfire weaponlight has an ultra-high output. Features Parabolic reflector, attaches securely to both a universal/Picatinny rail mount, 635nm class IIIa green laser, O-ring and gasket sealed, cam-slotted bezel and rear locking lugs on battery housing interface with MasterFire holster for secure weapon retention.