Optimized for Rifles with Short Rails; Pro Model Features Flexible Jack Cap® Tail Switch
EAGLEVILLE, PA, January 22, 2026 – Streamlight®Inc., a leading provider of high-performance lighting and weapon light/laser sighting devices, introduced the ProTac® Rail Mount 1L-X and the ProTac® 1L-X Pro, multi-fuel tactical lights with a compact design to fit short-barreled rifles, submachine guns, and carbines with limited rail space for both light and pressure pad. The new high-output lights, which also are available in USB configurations, deliver up to 850 lumens for extreme brightness. They will debut at SHOT Show 2026 in Las Vegas, where attendees can see them in person at Streamlight Booth #11468.
Lightweight and low profile, both feature a rugged, integrated rail clamp designed to rapidly and securely attach to guns with a MIL-STD 1913 Picatinny or M-LOK® rail system. The light-only models feature a standard push-button tail cap, providing ease of activation without a pressure pad. The Pro models also offer a Jack Cap® tail cap switch that provides dual operational redundancy, including push-button and remote pressure switch control, for the ultimate in flexibility.
The compact lights feature a smaller footprint profile for tight rail set ups (the light-only model is ideal for rifles where pressure pad space is extremely limited). Each light uses a lumen-focused beam optimized for short range clarity, delivering up to 850 lumens of blinding white light. The lights are powered by either one Streamlight SL-B9® protected lithium-ion rechargeable battery pack, or a single 3-volt CR123A lithium battery for use if the rechargeable cell is out of power.
“These multi-fuel weapon-mounted lights are the perfect solution for law enforcement, military and tactical users when using short-barreled lights in maneuvers under low-light conditions,” said Streamlight President Michael F. Dineen. “The Pro version features a Jack Cap tail switch that allows users to choose between using a push-button or remote pressure switch, depending on their preference. They are designed to deliver the ultimate in compact power for your rifle.”
Offering high, low and strobe settings, both lights feature a TEN-TAP® programmable switch that allows users to select one of three different programs: high/strobe (factory default); high only; or low/high.
On the high setting, the ProTac Rail Mount 1L-X USB and 1L-X Pro USB models deliver 850 lumens, 30,000 candela, and a run time of 30 minutes when using an SL-B9 battery; with a CR123A battery inserted, they provide 500 lumens, 18,000 candela and a 1.75-hour run time. On low, the lights offer up to 6.5 hours of run time,100 lumens and 3,400 candela depending on battery selection.
Both lights mount to a broad range of short-rail rifles and submachine guns, safely and securely by means of a one-handed snap on and tighten interface that permits users to keep their hands away from the gun muzzle.
The new models are fabricated from 6000 series machined aluminum with a black anodized finish and feature a high temperature, impact-resistant BOROFLOAT® glass lens. The ProTac Rail Mount 1L-X USB measures 4.64 inches long and weighs 5.12 ounces with a CR123A battery and 5.22 ounces with an SL-B9 rechargeable battery pack. The ProTac Rail Mount 1L-X Pro USB also is 4.64 inches in length, weighing 5.5 ounces with a CR123A battery and 5.6 ounces with the SL-B9 battery.
With the standard push-button switch installed, both lights are rated IP67 for waterproof operation to 1 meter for 30 minutes; when using the remote switch with the 1L-X Pro USB, the light is IP54 rated for water-resistant operation.
The ProTac Rail Mount 1L-X USB and the ProTac Rail Mount 1L-X have MSRPs of $190.00 and $181.00, respectively, while the ProTac Rail Mount 1L-X Pro USB and the ProTac Rail Mount 1L-X Pro have MSRPs of $221.00 and $212.00, respectively. All four models are backed by Streamlight’s Limited Lifetime Warranty.
