The Streamlight ProTac Rail Mount HL-X Pro USB, part number 88127 in black, is a long-throwing rail-mounted rifle light producing 1000 lumens and 50,000 candela for a 447 metre beam.
The Pro part is the Jack-Cap tail, which runs a push-button and a remote pressure switch at the same time, each working independently of the other, so one failing does not put the rifle in the dark.
The body is black anodised aluminium, 5.43 in (13.79 cm) long, weighing 7.2 oz with the SL-B26 pack fitted or 6.6 oz on CR123A cells, and rated IP67 with the push-button in place or IP54 with the remote switch. It is multi-fuel: the SL-B26 USB rechargeable battery pack and cord are supplied, and two CR123A lithium cells will run it as a fallback. It clamps to MIL-STD-1913 Picatinny directly and an M-LOK mount is included in the box.
Runtime on the SL-B26 is 1.75 hours on high, 24 hours on the 60 lumen low and 3.5 hours in strobe; on two CR123A cells that becomes 1.25 hours, 21 hours and 2.5 hours. TEN-TAP programming sets the mode order, so the light can be left as high and strobe, high only, or low then high, depending on whether you want the strobe available at all. Fifty thousand candela is a genuinely tight beam for a rail light, which is what puts usable light on something at distance rather than simply flooding the ground in front of you.
Why shooters choose the ProTac HL-X Pro
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Output — 1000 lumens with 50,000 candela peak beam intensity, reaching 447 metres
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Low mode — 60 lumens at 3,100 candela and 111 metres, for up to 24 hours
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Switching — Jack-Cap tail running a push-button and a remote pressure switch with redundancy
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Power — SL-B26 USB rechargeable pack supplied, or two CR123A lithium cells
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Programming — TEN-TAP selectable mode order
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Mounting — MIL-STD-1913 Picatinny, with an M-LOK mount included
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Build — black anodised aluminium, IP67 with the push-button fitted
What the ProTac HL-X Pro fits
It clamps straight onto a MIL-STD-1913 Picatinny rail, and the M-LOK mount in the box covers an M-LOK handguard without buying an adapter; our M-LOK vs Picatinny mounting guide covers the difference. The same beam without the Jack-Cap tail or the rechargeable pack is the ProTac Rail Mount HL-X, and a shorter, lighter option is the ProTac Rail Mount 2.
Specifications
| Output high |
1000 lumens / 50,000 candela / 447 m |
| Output low |
60 lumens / 3,100 candela / 111 m |
| Runtime on SL-B26 |
1.75 h high / 24 h low / 3.5 h strobe |
| Runtime on CR123A |
1.25 h high / 21 h low / 2.5 h strobe |
| Battery |
SL-B26 USB rechargeable pack (included) or two CR123A lithium cells |
| Activation |
Jack-Cap tail cap: push-button plus remote momentary pressure switch |
| Programming |
TEN-TAP programmable mode order |
| Mount |
MIL-STD-1913 Picatinny; M-LOK mount included |
| Length |
5.43 in (13.79 cm) |
| Weight |
7.2 oz with SL-B26 / 6.6 oz with CR123A |
| Finish |
Black anodised aluminium |
| Durability |
IP67 with push-button; IP54 with remote switch |
| MPN |
88127 |
A rechargeable rail light that still takes lithium cells, with two ways to switch it on. Order the ProTac HL-X Pro today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Weapon Lights, ProTac Rail Mount 1L-X USB Pro or browse all Streamlight.
