The Streamlight STL 89017 ProTac Rail Mount HP-X Pro is designed for those who demand exceptional performance in challenging conditions, delivering an impressive 105,000 candela for extreme beam reach that penetrates smoke, fog, and photonic barriers. This versatile light features a Jack-Cap tail cap switch that ensures operational redundancy, allowing users to easily switch between push-button operation and remote pressure switch functionality. Ideal for long guns equipped with MIL-STD-1913 rails, the ProTac Rail Mount HP-X Pro comes with an optional M-LOK mount, making it a perfect fit for various tactical setups. Constructed from durable 6000 series machined aircraft aluminum with an anodized finish, this light is built to withstand the rigors of outdoor use, boasting a gasket-sealed glass lens and an IPX7 rating for waterproof performance up to 1 meter for 30 minutes. With a beam distance of 648 meters and a maximum output of 800 lumens, this light ensures visibility in the darkest environments. The multi-fuel capability allows it to operate on either a rechargeable Streamlight SL-B26 battery pack or two CR123A lithium batteries, providing flexibility for extended use. Weighing in at just 6.40 ounces and measuring 5.63 inches in length, the ProTac Rail Mount HP-X Pro is both lightweight and compact, making it an essential tool for hunters, law enforcement, and tactical enthusiasts alike.