The Streamlight ProTac Railmount 1L from Streamlight is a versatile weapon-mounted light that delivers 350 lumens of brightness for reliable tactical illumination, featuring a dedicated fixed-mount for Picatinny rails to ensure secure, repeatable attachment to your firearm. This dual-fuel design accepts either a CR123A lithium battery or a readily available AA alkaline battery, giving you flexible power options in the field, while TEN-TAP Programming provides flexible operation modes such as high with strobe, high only, or low/high to match a variety of scenarios. A remote pressure switch supports momentary and constant-on operation, allowing rapid, intuitive control when timing and accuracy matter most. Built to withstand tough conditions, the ProTac Railmount 1L is machined from durable anodized aluminum with an impact-resistant tempered glass lens, and it carries an IPX7 waterproof rating when used with the standard button switch, ensuring performance in wet environments. Rated for extreme temperatures from -40F to +120F, this mounted light maintains dependable operation whether youre in cold, hot, or challenging environments. Ideal for law enforcement, military operations, or serious firearms enthusiasts, this Streamlight option combines powerful illumination with rugged reliability for critical moments at the range or in the field.