The Streamlight ProTac Rail Mount VIR Pro USB Weapon Light (part 88139) is a dual-spectrum rifle weapon light that pairs high-output white light with an integrated infrared illuminator for night-vision use. It produces 1100 lumens output and 40,000 candela peak beam intensity for a 400-metre beam in white light, plus a 2,300 mW infrared output on high at 940 nm.
This 88139 configuration includes Streamlight's SL-B26 USB rechargeable battery pack and charging cord, and it will also run two CR123A lithium cells. The Jack-Cap tailcap gives push-button operation and a remote pressure switch. White runtimes are 2 hours on high, 3.75 hours on medium and 14 hours on low on the SL-B26; the infrared runs 2 hours on high and 9 hours on low. A head-mounted selector switches between visible and infrared with a safety cut-off that prevents accidental white-light activation in infrared mode. It mounts to Picatinny (MIL-STD-1913) or M-LOK, in 6000-series aircraft aluminium with an anodised finish and a BOROFLOAT lens, rated IPX7.
How It Compares
Prefer the other battery package? The ProTac VIR Pro rifle light and IR illuminator on CR123A cells. Need infrared on a pistol instead? The TLR-VIR II weapon light with IR illuminator and laser. White light only, at long range? The TLR-1 HP-X at 77,000 candela. Read our lumens versus candela chart, or browse the wider range of weapon-mounted lights and our tactical lighting.
Ideal For
- Lamping and night fox or vermin control from a rifle
- Night-vision-equipped rifles and carbines
- Farm, kennels and yard work after dark
- Long-range target identification, at 40,000 candela and 400 metres
- Airsoft milsim night games where night vision is in use
Key Features
- 1100 / 540 / 120 lumens white output, with 40,000 candela and a 400-metre beam on high
- 2,300 mW infrared illuminator on high (600 mW low) at 940 nm, for night-vision use
- Head-mounted selector with a safety cut-off against accidental white-light activation
- SL-B26 USB rechargeable pack and charging cord included; also runs two CR123A cells
- Jack-Cap tailcap with push-button and remote pressure-switch operation
- Picatinny (MIL-STD-1913) and M-LOK mounting; BOROFLOAT lens; 6000-series anodised aluminium
Technical Specifications
| White Output |
1100 / 540 / 120 lumens |
| Peak Beam Intensity |
40,000 candela (400 metres) / 19,000 candela (276 metres) / 4,200 candela (130 metres) |
| IR Output |
2,300 mW high / 600 mW low, at 940 nm |
| Battery |
SL-B26 USB rechargeable pack (included) or two CR123A lithium cells |
| Runtime (white light) |
2 hours / 3.75 hours / 14 hours (SL-B26); 1.5 hours / 2.75 hours / 11 hours (CR123A) |
| Runtime (infrared) |
2 hours high / 9 hours low (SL-B26); 1.25 hours high / 7.25 hours low (CR123A) |
| Mount |
Picatinny (MIL-STD-1913) / M-LOK |
| Lens / Material |
BOROFLOAT / 6000-series anodised aluminium |
| Length / Weight |
5.65 in (14.35 cm) / 8.8 oz with SL-B26 (8.2 oz with CR123A) |
| Water Resistance |
IPX7 with the push-button fitted; IPX4 with the remote switch fitted |
| SKU / MPN / UPC |
88139 / 88139 / 080926881396 |
| Warranty |
Streamlight limited lifetime warranty |
What's Included
- Streamlight ProTac Rail Mount VIR Pro USB weapon light
- SL-B26 rechargeable battery pack and USB charging cord
- Remote pressure switch and remote retaining clips
- M-LOK mount and mounting hardware
- Manual
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Streamlight's limited lifetime warranty.
Frequently Asked Questions
What does the Streamlight ProTac Rail Mount VIR Pro USB (88139) mount to?
The Streamlight ProTac Rail Mount VIR Pro USB mounts to Picatinny (MIL-STD-1913) rails and to M-LOK, and the M-LOK mount and mounting hardware are supplied in the box.
How bright is the Streamlight ProTac Rail Mount VIR Pro USB and how far does the white beam reach?
The Streamlight ProTac Rail Mount VIR Pro USB produces 1100 lumens output and 40,000 candela peak beam intensity on high, which gives a beam distance of 400 metres; the medium and low settings give 540 lumens at 276 metres and 120 lumens at 130 metres.
Do I need night vision to use the infrared on the Streamlight ProTac Rail Mount VIR Pro USB?
Yes — the infrared illuminator on the Streamlight ProTac Rail Mount VIR Pro USB works at 940 nm, which is invisible to the naked eye and requires night-vision equipment to see.
What battery does the Streamlight ProTac Rail Mount VIR Pro USB use, and is it rechargeable?
The Streamlight ProTac Rail Mount VIR Pro USB 88139 is supplied with an SL-B26 USB rechargeable battery pack and a USB charging cord, and it will also run two CR123A lithium cells if you prefer primaries.
How long does the Streamlight ProTac Rail Mount VIR Pro USB run for?
The Streamlight ProTac Rail Mount VIR Pro USB gives 2 hours / 3.75 hours / 14 hours (SL-B26); 1.5 hours / 2.75 hours / 11 hours (CR123A) in white light, and 2 hours high / 9 hours low (SL-B26); 1.25 hours high / 7.25 hours low (CR123A) in infrared.
Is the Streamlight ProTac Rail Mount VIR Pro USB waterproof?
The Streamlight ProTac Rail Mount VIR Pro USB is rated IPX7 with the push-button tailcap fitted, and IPX4 when the remote pressure switch is fitted instead.
