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Streamlight

Streamlight 88066 ProTac Rail Mount HL-X Tactical Gun Light, Black

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Availability: In Stock.
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Arrives Wednesday, Oct 21
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Style: Protac Rail Mount HL-X, 1,000 Lumens


Size: 1 Pack


Features

  • Bright Performance: Delivers up to 1,000 lumens, 50,000 candela, and a beam distance of up to 447 meters for powerful long-range illumination with balanced peripheral light
  • Ready When You Are: Securely mounts to compatible MIL-STD-1913 Picatinny rails, providing dependable illumination for rifles, carbines, and other long gun platforms
  • Mission Ready Controls: Includes a remote pressure switch and tail cap switch for convenient momentary or constant-on activation, while TEN-TAP programming lets you customize lighting modes for the mission
  • What's in the Box: Includes ProTac Rail Mount HL-X tactical gun light, remote pressure switch, tail cap switch, mounting hardware, rail locating accessories, and product documentation
  • Built Streamlight Tough: Machined aircraft-grade aluminum construction with an anodized finish, impact-resistant glass lens, IPX7 waterproof design, impact-resistant construction, and Streamlight's Limited Lifetime Warranty

Description

The Streamlight ProTac Rail Mount HL-X is a compact, high-performance tactical gun light built to deliver powerful long-range illumination for rifles, carbines, and other compatible long gun platforms. Producing up to 1,000 lumens, 50,000 candela, and a beam distance of up to 447 meters, it provides exceptional target identification while maintaining balanced peripheral light for enhanced situational awareness. Streamlight's TEN-TAP® programmable switch, along with the included remote pressure switch and tail cap switch, allows users to configure operation for the mission and preferred shooting style. Designed for secure attachment to compatible MIL-STD-1913 Picatinny rails, the low-profile Rail Mount HL-X provides dependable performance without compromising firearm handling. Precision-machined aircraft-grade aluminum construction, an impact-resistant glass lens, IPX7 waterproof performance, and rugged impact resistance help ensure reliable operation in harsh environments. Built Streamlight Tough, it delivers dependable performance when it matters most and is backed by Streamlight's Limited Lifetime Warranty.

Special Feature: Adjustable Light Modes, High Lumens, Weatherproof


Color: Black


Power Source: Battery Powered


Light Source Type: LED


Material: Aluminum


Additional Features: Adjustable Light Modes, High Lumens, Weatherproof


Power Source: Battery Powered


Light Source Type: LED


White Brightness: 1000 lumens


Voltage: 3 volts


Battery Type: Lithium Metal


Number of Batteries: 2 CR123A batteries required. (included)


Water Resistance Level: Waterproof


Light Output Maximum: 1000 lumens


Battery Description: Lithium-Ion


Bulb Base: Wedge


Light Source Wattage: 4.6 watts


Mounting Type: Gun Mount


Battery Life: 5 hours


Light Source Special Features: Concentrated Beam, Impact Resistant, High Power


Runtime: 1 hour


Number of Light Sources: 1


Wattage: 4.6 watt-hours


Light Path Distance: 447 meters


Color: Black


Style Name: Protac Rail Mount HL-X, 1,000 Lumens


Finish Types: Black


Shape: Round


Warranty Type: Limited


Specification Met: ANSI FL1, CE, IP67


Included Components: Lithium Batteries, Mounting Hardware, Remote Retaining Clips, Remote Switch, Tail Switch


Brand Name: Streamlight


Recommended Uses For Product: Camping, Emergency, Hiking, Security, Tactical


Global Trade Identification Number: 65


Number of Packs: 1


Manufacturer: Streamlight


Number of Items: 1


Item Highlight: 1,000 lumens; 50,000 candela; long-range beam; Picatinny rail mount


UPC: 080926880665


Manufacturer Warranty Description: Limited lifetime warranty.


Unit Count: 1 Count


Item Length: 4.1 inches


Item Type Name: Mounted Light


Model Number: 88066


Set Name: Non-USB, Clear Retail Packaging


Manufacturer Part Number: 88066


Item Dimensions D x W x H: 5.43"D x 1.45"W x 1.72"H


Item Weight: 6.4 ounces


Size: 5.43 x 1.45 x 1.72


Item Dimensions L x W x H: 5.43"L x 1.45"W x 1.72"H


Material Type: Aluminum


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Oct 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The Streamlight ProTac 2AAA and ProTac 1L flashlights receive outstanding reviews from customers who have used them for extended periods. One customer had the ProTac 2AAA for 5 years and praised its slim size, durability, battery life, and brightness levels. Another customer, a police officer, praised the ProTac 1L's small size, light output, rugged and waterproof design, and good battery life.

Pros

  • 🔦 Extremely durable and reliable.
  • 🔋 Excellent battery life.
  • 🔍 Two or more brightness level.
  • 🎒 Compact size that can fit in a pocket.
  • đź’ˇ Adequate light output.
  • 🌧️ Rugged and waterproof design.

Cons

  • 🔆 May not be as bright as some other models.
  • 🔄 Rechargeable batteries not included.

Should I Buy It?

If you're looking for a small, durable, and reliable flashlight with excellent battery life and satisfactory brightness, the Streamlight ProTac 2AAA and ProTac 1L are highly recommended. Despite minor downsides, both models offer outstanding value for their price.

    • 88066 Pro Tac Rail Mount Light
Set name: Non-USB, Clear Retail Packaging
I trust Streamlight as I have a TLR-7 and the build quality, fit and finish really impressed me for the price, and the brightness was very good (it’s bright enough that looking directly into it will nearly blind you temporarily). It also was great in how it attached, ease of use etc. I liked everything about it, so I went with Streamlight for this purchase as well. I have no complaints so far, it seems like a solid light and basically exactly what I expected (I haven’t used the switch, as I feel I can thumb the button just as easily with it on the left side, and won’t accidentally hit it). The brightness is just as strong as I expected as well. In regard to a review talking about getting a fake one, I did not (mid 2022). The build quality is just as I’d expect, it’s robust and the finish is very nice. It’s very easy to attach to a pic rail (if you have an MLOK guard you just need a little pic rail, they’re cheap), and it has a hand-tightening nut attaching it. The nut has a slot cut into it as well so you can use a tool (a knife, whatever fits) if you ever needed to loosen it if it seizes up a bit. The only thing that surprised me a bit was the size. It’s a little bigger than I expected and hoped for, but that’s why you should research before buying anything lol. It’s fine honestly, just a little larger than I realized. I would’ve preferred a slightly smaller/lighter light, but the fact that it’s big enough to be used by hand is probably a benefit anyway. I suppose it’s a normal size for a light of this nature, I have never owned one so it’s new for me. It looks a little big on the there in terms of aesthetics, that’s all. If anything goes wrong with it I’ll update. But as of now I recommend it and I definitely recommend Streamlight. I like their products. ... show more
Reviewed in the United States on July 28, 2022 by Frank
    • Best choice
Set name: Non-USB, Clear Retail Packaging
I’ve used other lights on other guns and this is the best choice in my opinion so far. I actually came from a YouTube video demonstrating how well this performs compared to other options. This comes complete with what you need as well as a multi function pressure pad. It’s cheaper and I compare to my other light double the price it’s on par with quality. Only pet peeve I had was is installing the pressure pad. Slight pain in the rear but once it was done I used the provided zip ties and cleaned up the wire. Extremely bright as well, very pleased. ... show more
Reviewed in the United States on May 24, 2026 by David
    • Great light for emergency situations.
Set name: Non-USB, Clear Retail Packaging
I picked this up and mounted it on my go-to equipment for emergencies. The light is incredibly bright, and the strobe feature is excellent for situations that may require its use. A single tap and hold on the pressure switch gives you a constant-on; a double-tap and hold gets you a strobe effect that would be disorienting to look at from the business end of the light. An easy-to-use switch at the end of the pressure switch gives you a continuous-on option if stealth isn't necessary. The light is of a reasonable size unless you're packing your rails full of other mods. The fact that it comes with both Pic rail and M-Lok compatibility is nice. The one caveat is that it does not readily mount on the Magpul MOE M-Lok forend due to the angle of the mount and the angle of the MOE guards. The Pic rail adapters for the pressure switch work well and don't come loose easily. It also comes with screws to ensure the switch and rail adapters do not separate in turbulent situations. Overall, I'm very pleased with this light. ... show more
Reviewed in the United States on November 5, 2025 by M.A.
    • Outstanding light! Consider the 88071 model HL-X instead
Set name: Non-USB, Clear Retail Packaging
This is my second Streamlight HL-X. The first one I purchased is the 88071, this is an 88066. I recommend going with the 88071 because it includes the Streamlight 18650 rechargeable battery - this model ships with two Streamlight CR123s. This was my fault, so I have not deducted any overall stars. The light itself has great output and is well constructed. Out of the box, you get the light, two batteries, a clicky tailcap, and a tape switch tailcap. It also comes with a piece of adhesive for the tailcap, two zip ties, and two rubber feet for attaching the tape switch to 1913 rails. My recommendation is to upgrade to a Cloud Defensive LCSMK2J tape switch mount, since the zip ties can get a bit unruly and the Cloud Defensive mount has better cable management. That being said, if you are just trying to get your firearm up and running, it is great that Streamlight includes a mounting solution. The tape switch itself is somewhat mushy but can be activated across the whole length of the switch, unlike some other options I have tried where you need to press directly in the middle. The constant activation button has a helpful shield around it to prevent unintentional activations, and I tend to mount my tape switches so that this button faces away from me. The Streamlight HL-X ships with a 1913 thumb screw mount installed in the box. This is an okay mount, but it is a bit on the bulky side. The HL-X is compatible with most Surefire Scout footprint mounts, so I replaced the included 1913 mount with a Magpul M-LOK offset Scout polymer mount and hardware from Arisaka defense. If you don't want to pay for the $3 in hardware, you can attach the 1913 thumb screw mount to the Magpul offset adapter as well since it has a slot for the cross bar. The main downside to the HL-X's mounting system is the screw body placement. Most Surefire Scout lights and other lights that use the same two hole mounting pattern bias the mounting holes to the rear of the light to move the light forward on the gun compared to the mount. Surefire does not do this - the holes are smack dab in the middle of the light body. Combine this with the already bulky nature of the Streamlight HL-X and you may have some packaging issues when trying to set up a weapon with limited rail space. I may eventually transition to a Haley Strategic Thorntail SBR mount to remedy this since it pushes the light even farther forward. I would simply go with a longer Arisaka in-line mount and put it on the 1:30 section of 1913 rail, but the screw hole location prevents you from using the Arisaka in-lines without modifying a hex key to tighten the hardware. Overall, for the price, I feel that this light, despite the bulk and mounting issues, is a solid contender for a carbine or shotgun. With some upgrades to accessories like a light mount and a tape switch mount I think the Streamlight HL-X will serve you well. ... show more
Reviewed in the United States on August 11, 2022 by Eduardo Torres
    • Very Good Light
Set name: Non-USB, Clear Retail Packaging
This is a very good light and that isn't considering the low price. It's just good in general. The price makes it even better. The light itself appears to be built well. Light is a bit of a cooler tone but almost neutral. Hotspot in the center of the light is BRIGHT. Can illuminate things well at quite a distance. Beam itself isn't perfect but will not matter or even be noticed by virtually anybody buying it. The pressure switch works. It mounts fine. Everything works. Now I love paying for quality but I just cannot fathom how someone will spend $400+ on an arguably worse flashlight and a better pressure switch from a competitor. This is as good or better in ways for almost 1/3 the price. People say "oh the military uses that brand!" Great. Most police and fire departments use Streamlight and like them. Some say "oh the other brand is made in America!" Yeah they're an american company. They manufacture some things in the U.S. but look on the box or the light itself. You will not see "Made in U.S.A." on it, because there are parts of the light not made in America. Streamlight is also an American company. So you can spend 1/3 the money on this better flashlight trusted by our first responders or you can buy a 3x as expensive light that actually illuminates things worse and isn't even technically made in America. Either way you're supporting an American company. I'd highly recommend buying Streamlight. ... show more
Reviewed in the United States on October 9, 2020 by Ken
    • Not bad
Set name: Non-USB, Clear Retail Packaging
Value compared to surefire is excellent, build quality is very good. It is quite large for what I was expecting though, and the top rail mount for the pressure switch they give you does kinda suck.
Reviewed in the United States on September 11, 2026 by Jonathan
    • Muy buena calidad
Set name: Non-USB, Clear Retail Packaging
Excelente
Reviewed in the United States on September 11, 2026 by Alex Cabot
    • Would buy again
Set name: Non-USB, Clear Retail Packaging
Amazing light. It mounts very easily to my rail and the attachment to turn it on/off/strobe also amounts very easily to the top of my rail so I can control it with my thumb. Strong light, great battery life. Not sure how size compared to others, but I am OK with the size of this as it isn’t too big in my opinion. buttons are also extremely smooth and low profile. ... show more
Reviewed in the United States on January 21, 2026 by Colin Weber

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