The Streamlight ProTac Rail Mount HL-X Pro Light is a high-output tactical flashlight built for AR-platform rifles and other Picatinny-equipped firearms. With 1,000 lumens on high and a 50,000 candela throw that reaches 447 meters, this gun-mounted light delivers serious illumination for home defense, tactical training, and low-light hunting scenarios. The compact, rail-mounted design keeps your rifle balanced and ready without adding unnecessary bulk or weight.

Flexibility is built in. The jack-cap tail switch supports both push-button operation and remote pressure switch input, so you can run it solo or wire a remote switch for hands-free activation. TEN-TAP programming lets you choose your operating mode: high with strobe, high only, or low-and-high for versatile light management. A low setting drops output to 60 lumens and stretches runtime to 21 hours—ideal when you need to preserve battery life or avoid overpowering close-quarters environments.

The light runs on either a Streamlight SL-B26 protected Li-Ion USB rechargeable battery pack or two CR123A lithium batteries, giving you options based on your charging setup. Built from anodized aluminum with tempered glass optics and IP67 waterproof sealing (down to 1 meter for 30 minutes), it's engineered to handle field conditions without flinching. Whether you grab the light-only head or the complete system with remote pressure switch, clips, and mounting hardware, you're getting a proven workhorse for serious shooters.

Key Features

• 1,000 lumens on high; 60 lumens on low for tactical flexibility
• 447-meter beam distance with 50,000 candela intensity
• TEN-TAP programming: high/strobe, high only, or low/high modes
• Dual switch operation—jack-cap tail switch and remote pressure switch compatible
• Compatible with CR123A or Streamlight SL-B26 USB rechargeable battery
• Integrated MIL-STD-1913 (Picatinny) rail clamp for secure mounting
• Anodized aluminum construction with impact-resistant tempered glass lens
• IP67 waterproof rated (without remote switch); IP54 water-resistant (with remote switch)

Specifications

Output (High)	1,000 lumens
Output (Low)	60 lumens
Candela (Max)	50,000
Beam Distance	447 meters
Runtime (High, CR123A)	1.25 hours
Runtime (High, SL-B26)	1.75 hours
Runtime (Low, CR123A)	21 hours
Runtime (Low, SL-B26)	24 hours
Runtime (Strobe, CR123A)	2.5 hours
Runtime (Strobe, SL-B26)	3.5 hours
Battery Options	Two CR123A lithium or Streamlight SL-B26 protected Li-Ion USB rechargeable
Length	5.43 inches (13.79 cm)
Weight	6.60–7.20 ounces (187–204 grams)
Construction	Anodized aluminum with tempered glass lens
Water Rating	IP67 (1 meter, 30 minutes, without remote switch); IP54 (with remote switch)
Color	Black

Frequently Asked Questions

What rail systems is this light compatible with?

The ProTac HL-X Pro clamps to any MIL-STD-1913 (Picatinny) rail, including standard AR-platform handguards, shotgun fore-ends, and most tactical rifle setups.

Can I use a remote pressure switch with this light?

Yes. The light is compatible with a remote pressure switch, which connects through the jack-cap tail switch for hands-free operation. Note that adding a remote switch changes the water rating from IP67 to IP54.

What's the difference between the light-only and system configurations?

The system includes the remote pressure switch, jack-cap tail switch, remote retaining clips, double-sided tape, zip ties, and M-LOK mount hardware. The light-only version is just the head itself; you'll need a separate mount or adapter to attach it to your rail.

How long does the battery last on low?

On low output (60 lumens), you'll get 21 hours from two CR123A batteries or 24 hours from the Streamlight SL-B26 rechargeable pack.