ProTac Rail-Mount HP-X Pro USB Tactical Flashlight - 800 Lumens

In this review the Streamlight ProTac Rail-Mount HP-X Pro is evaluated for shooters and outdoor professionals who need a reliable, rail-mounted tactical light. The bottom line: it pairs high output with versatile mounting options and robust weather resistance, making it a practical choice for those who require a stable beam on long guns. The review focuses on build, beam performance, power options, and ease of installation to help readers decide if this system fits their gear and missions.

Key Features

• Bright output: The HP-X Pro produces up to 800 lumens and a 105,000 candela beam that reaches long distances for target ID and navigation.
• Multiple mounts: It ships with a MIL-STD-1913 rail interface and an optional M-LOK mount, which broadens compatibility with modern handguards.
• Programmable modes: TEN-TAP programming lets you choose high, low, or strobe to match mission needs and conserve runtime.
• Multi-fuel capability: Run the light on two CR123A batteries (included) or an SL-B26 protected Li-Ion pack for rechargeability and longer service life.
• Weather resistance: IP67 waterproofing keeps the light sealed to 1 meter for 30 minutes without the remote switch, while IP54 with the switch installed preserves water resistance in wet conditions.

Who It's For

The ProTac Rail-Mount HP-X Pro is aimed at firearm owners, law enforcement users, and hunters who mount lights on long guns with MIL-STD-1913 rails or M-LOK-compatible forends. Its long beam and high candela output suit situations where forward reach and target identification matter, such as low-light navigation, perimeter checks, and tactical applications.

Users who should look elsewhere include those needing an ultra-compact handheld flashlight or users restricted to weapon systems without Picatinny or M-LOK mounting points. Also consider alternatives if you require a remote pressure switch as a permanent weatherproof solution, since weather resistance drops with the switch installed.

Pros & Cons

Pros

• High peak output of 800 lumens with a concentrated 105,000 candela beam for long-range visibility.
• Includes both Picatinny rail mounting and an optional M-LOK mount, increasing platform compatibility.
• Flexible power options: accepts two CR123A cells or a Streamlight SL-B26 rechargeable pack for convenience.
• Durable construction with IP67 rating when the remote pressure switch is not fitted.

Cons

• Waterproof rating decreases to IP54 when the remote pressure switch is installed, so full submersion protection is not available with the switch attached.

Specifications

Peak output	800 lumens
Candela	105,000 candela
Beam distance	648 meters
Mounting	MIL-STD-1913 rail; optional M-LOK mount included
Power	(2) CR123A batteries included or SL-B26 Li-Ion pack
Water resistance	IP67 without pressure switch; IP54 with switch
Modes	TEN-TAP programmable high/low/strobe

Our Verdict

The ProTac Rail-Mount HP-X Pro is a solid choice for shooters who need a high-candela, rail-mounted weapon light with flexible mounting and power options. Its brightness, programmable modes, and included M-LOK compatibility deliver practical value for tactical and hunting use, though buyers should account for reduced waterproofing when using the remote pressure switch.

Frequently Asked Questions

Can it be mounted on both PIC rail and M-LOK handguards?
Yes. It fits MIL-STD-1913 rails and includes an optional M-LOK mount to broaden compatibility.

What batteries does it use and are they included?
The light accepts two CR123A batteries which are included, or an SL-B26 rechargeable Li-Ion pack sold separately.

Is it waterproof with the pressure switch attached?
With the remote pressure switch installed the light is rated IP54 water-resistant; full IP67 waterproofing applies only without the switch.