The ProTac Rail Mount 1L-X is a compact, multi-fuel, high-output tactical light designed for short-barreled rifles, carbines, and submachine guns. Featuring a standard push-button tail cap, this light offers ease of activation without a pressure pad. 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 batteriesTEN-TAP Programming Allows for Selection of Three Different Operating Programs:1) High/Strobe (Factory Default) 2) High Only 3) Low/HighHigh: 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 railsStandard push-button tail cap offers ease of activation without a pressure padOne-handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching from the firearm6000 Series machined aircraft aluminum with black anodized finishHigh-temperature, shock-mounted, anti-reflective coated, impact-resistant BOROFLOAT glass.Extensively live fire tested, impact-resistant constructionIP67 rated with standard push-button switch installed; waterproof to 1 meter for 30 minutesIP54 rated with the remote pressure switch installed for water-resistant operationWeight: 5.12 oz (145.2g) with (1) CR123A battery; 5.22 oz (148g) with (1) SL-B9 rechargeable battery packStreamlight's Limited Lifetime Warranty