The ProTac Rail Mount 1L-X Pro is a compact, multi-fuel, high-output tactical light designed for short-barreled rifles, carbines, and submachine guns. Featuring the innovative Jack-Cap tail cap, this light offers dual operational redundancy - choose push-button activation or remote pressure switch control for ultimate flexibility. The integrated port ensures secure attachment of the remote pressure switch, while the rail clamp system fits MIL-STD-1913 Picatinny rails. It also includes an M-LOK mount for alternative mounting options on M-LOK compatible rail systems. This tactical light delivers high lumen output for superior visibility in low-light environments. It is perfect for law enforcement, military, and tactical applications. Multi-Fuel: Uses (1) Streamlight SL-B9 protected Li-Ion USB rechargeable battery pack; also accepts (1) CR123A lithium batteries TEN-TAP Programming Allows for Selection of Three Different Operating Programs: 1) High/Strobe (Factory Default) 2) High Only 3) Low/High High: 850 lumens; 30,000 candela; 346m beam distance; 0.5 hours (SL-B9). 500 lumens; 18,000 candela; 268m beam distance; 1.75 hours (CR123A) Low: 100 lumens; 3,400 candela; 117m beam distance; 4.5 hours (SL-B9). 100 lumens; 3,400 candela; 117m beam distance; 6.5 hours (CR123A) Strobe: 1.25 hours (SL-B9); 2.5 hours (CR123A) Mounts directly to guns with MIL-STD-1913 (Picatinny) rails or M-LOK and M-LOK compatible rails Jack-Cap tail cap offers push-button switch and port for a remote pressure switch. Multi-function, push-button tail switch with momentary and latching constant-on operations. Momentary only remote switch included One-handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching from the firearm 6000 Series machined aircraft aluminum with black anodized finish High-temperature, shock-mounted, anti-reflective coated, impact-resistant BOROFLOAT glass. Extensively live fire tested, impact-resistant construction IP67 rated with standard push-button switch installed; waterproof to 1 meter for 30 minutes IP54 rated with the remote pressure switch installed for water-resistant operation Weight: 5.5 oz (155.9g) with (1) CR123A battery; 5.6 oz (158.8g) with (1) SL-B9 rechargeable battery pack Streamlight's Limited Lifetime Warranty