The Holosun P.ID-K Rail-Mount Gun Light provides up to 500 lumens of brightness along with multiple power options. This powerful weapon light provides 500 lumens/6,500 candela on high mode and 250 lumens/3,000 candela on low mode, providing quick target identification in a variety of low-light scenarios. It can be powered by the included 16340 rechargeable battery or by a single CR123A battery, providing versatility in the field. Its adjustable universal mounting system allows the light to slide forward or backward for an optimal fit on a wide range of handguns, including the GLOCK 45, 43X MOS, 48 MOS, 19, & 47; Springfield Armory Hellcat & Hellcat Pro; Smith & Wesson M&P 2.0; Shadow Systems MR920; SIG SAUER P365 X-Macro; and more. It's also compatible with most Streamlight TLR7-compatible holsters. 7075-T6 aluminum construction. 500 lumens/6,500 candela on high 250 lumens/3,000 candela on low Can be powered by the included 16340 rechargeable battery or a single CR123A battery Universal mounting system fits a wide variety of handguns 7075-T6 aluminum construction Fits most Streamlight TLR7-compatible holsters