The XH30 is made to work with MASTERFIRE. Once attached to the MASTERFIRE you can set it to automatically illuminate the draw. Custom TIR lenses create a smoother and longer beam with a larger center spot beam. You can switch between 1000 or 300 lumens and strobe modes with the mode selector slide switch at the bottom of the main unit. Housing is made of high strength aerospace aluminum body. Spot beam pattern for long gun This model is designed to fit the MASTERFIRE WEPONLIGHTS SureFirre Masterfire Rapid Deploy Holster. Precision machined bezel and channel housings ensure interface with Masterfire holster. Combine with weapon light mounted pistols and holsters for a perfect fit with your firearm. Holster features weapon light auto-irradiation when drawing. With its robust body, powerful features, high reliability, and ergonomic intuitive switch operation functions, this is a weapon light that is all about Surefire philosophy.