The Streamlight ProTac Rail Mount 1L-X USB Pro Weapon Light with SL-B9 Battery Pack offers compact rifle-light performance with strong output and a simple push-button tail cap for straightforward operation. Designed for short-barreled rifles, carbines, and submachine guns, it delivers 850 lumens, 30,000 candela, and a 346 m beam and supports Picatinny or M-LOK mounting. BOROFLOAT glass and an IP67-rated waterproof design add dependable field durability.