The Streamlight ProTac Rail Mount 1L-X Weapon Light with CR123A Battery 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 500 lumens, 18,000 candela, and a 268 m beam and supports Picatinny or M-LOK mounting. BOROFLOAT glass and an IP67-rated waterproof design add dependable field durability.