Streamlight Protac Rail Mount HL-X Pro Long Gun Light - USB Rechargeable, Model 88127

The Streamlight ProTac Rail Mount HL-X Pro is a purpose-built tactical light for long-gun platforms that demands serious performance on the hunt, at the range, or in home defense scenarios. This rechargeable mounted light delivers 1,000 lumens on high with a 447-meter beam distance—enough reach to light up distant targets and terrain with precision. The compact, low-profile design integrates seamlessly onto any MIL-STD-1913 Picatinny rail, and its durable anodized aluminum body and tempered glass lens are built to handle the recoil and elements without complaint.

What sets the HL-X Pro apart is operational flexibility. The Jack-Cap tail switch gives you redundancy: use the push-button tail cap for traditional operation, or add the included remote pressure switch for instinctive thumb control along the fore-end. TEN-TAP programming lets you choose your preferred firing mode—high with strobe, high only, or low and high—so you can tailor the light to your mission. Battery options matter too: the light ships ready to run on a single Streamlight SL-B26 USB-rechargeable Li-Ion pack or two CR123A lithium batteries if you need field-swappable power.

Runtime on the SL-B26 hits 1.75 hours on high and 24 hours on low, giving you serious endurance whether you're running a night operation or an extended low-light hunt. The low-output mode (60 lumens, 111-meter reach) stretches that battery life dramatically and preserves your night vision for closer work. At just 6.6 ounces, the light won't throw off your rifle's balance, and its IP67 waterproof rating keeps it functional in rain or rough conditions.

Streamlight bundles the System package with a remote pressure switch, remote retaining clips, mounting tape, and zip ties—everything you need to get running. If you already have your mounting solution sorted, the light-only option is available. Either way, you're getting a proven, reliable platform that has earned trust in professional and civilian duty for years.

Key Features

• 1,000 lumens on high with 50,000 candela intensity and 447-meter beam reach
• USB-rechargeable SL-B26 battery included; also accepts CR123A batteries for backup power
• Dual-switch operation: push-button tail cap and optional remote pressure switch for tactical flexibility
• TEN-TAP programming for three selectable modes: high/strobe, high only, or low/high
• Low mode delivers 60 lumens with 24-hour runtime on rechargeable battery
• Integrated Picatinny rail mount fits standard MIL-STD-1913 rails
• Lightweight at 6.6 ounces; compact 5.43-inch profile minimizes rifle impact
• Anodized aluminum body with impact-resistant tempered glass lens
• IP67 waterproof rating (without remote switch); IP54 water-resistant (with remote switch installed)
• System package includes remote pressure switch, retaining clips, mounting tape, and zip ties

Specifications

Frequently Asked Questions

What's included in the Streamlight ProTac HL-X Pro System package?

The System comes with the light, a remote pressure switch for fore-end thumb operation, remote retaining clips, double-sided mounting tape, zip ties, and the rechargeable SL-B26 battery. If you prefer a light-only option without the remote switch assembly, that's available separately.

Can I use regular CR123A batteries instead of the rechargeable SL-B26?

Yes. The ProTac HL-X Pro accepts either one Streamlight SL-B26 USB-rechargeable Li-Ion battery or two CR123A lithium batteries. On high, you'll get 1.25 hours of runtime from the CR123As versus 1.75 hours from the SL-B26, and on low the CR123As deliver 21 hours compared to 24 hours from the rechargeable pack. This dual-battery compatibility is handy for field swaps if your rechargeable runs out.

Will this light work with my Picatinny rail rifle?

Yes. The ProTac HL-X Pro has an integrated rail clamp designed for MIL-STD-1913 Picatinny rails, which are the standard on most modern rifles and carbines. It mounts securely and low-profile without special adapters.

Is the remote pressure switch waterproof?

The light alone is IP67 waterproof (rated to 1 meter for 30 minutes without the remote switch installed). When you add the remote pressure switch, the water rating drops to IP54 (water-resistant), so it handles typical wet conditions but isn't rated for full submersion.

What does the strobe mode do, and how long will it run?

Strobe mode flashes the light for disorientation or signaling. It runs 3.5 hours on the SL-B26 rechargeable battery or 2.5 hours on CR123As. You can select strobe as part of the high/strobe programming mode via TEN-TAP.