The Streamlight ProTac Rail Mount HL-X Pro USB (SKU 88127, black) is a rechargeable long-throwing rifle light producing 1000 lumens output and 50,000 candela peak beam intensity for a 447 metre beam, supplied with the SL-B26 USB rechargeable battery pack and cord.
The Pro adds the Jack-Cap tail cap, which runs a push-button and a remote momentary pressure switch with full redundancy, so either can fail without taking the light out of action. TEN-TAP programming sets the mode order to high/strobe, high only, or low/high, and the 60 lumen low runs up to 24 hours. It also accepts two CR123A cells as a backup fuel source. Black anodised aluminium, rated IP67 with the push-button fitted.
How It Compares
The same 50,000 candela beam without the Jack-Cap or the rechargeable pack is the Streamlight ProTac Rail Mount HL-X rifle weapon light, which is the cheaper CR123A-only build. For a shorter, lighter rail light see the Streamlight ProTac Rail Mount 2 rifle weapon light. Browse all rechargeable rifle and pistol lights or every rifle and shotgun mounted light.
Ideal For
- Lamping and night fox control, where 50,000 candela puts light on quarry at distance
- High-use rifles where recharging beats buying CR123A cells
- Civilian Service Rifle, straight-pull and 3-Gun rifles on Picatinny or M-LOK handguards
- Setups that need switch redundancy rather than a single point of failure
Key Features
- 1000 lumens output and 50,000 candela peak beam intensity; 447 metre beam
- 60 lumen low with 3,100 candela and up to 24 hours of runtime
- Jack-Cap tail cap running push-button and remote pressure switch with independent redundancy
- Multi-fuel: SL-B26 USB rechargeable pack supplied, or two CR123A cells
- TEN-TAP programmable mode order; Picatinny mount with M-LOK mount included
- Black anodised aluminium; IP67 with push-button fitted
Technical Specifications
| Output |
1000 lumens / 50,000 candela / 447 m on high; 60 lumens / 3,100 candela / 111 m on low |
| Runtime |
1.75 h high / 24 h low / 3.5 h strobe on SL-B26; 1.25 h / 21 h / 2.5 h on two CR123A cells |
| Battery |
SL-B26 USB rechargeable pack (included) or two CR123A lithium cells |
| Activation |
Jack-Cap tail cap: push-button plus remote momentary pressure switch |
| Mount |
MIL-STD-1913 Picatinny; M-LOK mount included |
| Length / Weight |
5.43 in (13.79 cm) / 7.2 oz with SL-B26, 6.6 oz with CR123A cells |
| Finish |
Black anodised aluminium |
| Durability |
IP67 with push-button; IP54 with remote switch |
| SKU / MPN / UPC |
88127 / 88127 / 080926881273 |
| Warranty |
Streamlight Limited Lifetime |
What's Included
- Streamlight ProTac Rail Mount HL-X Pro USB weapon light (black)
- Jack-Cap, momentary pressure switch and mounting hardware
- M-LOK mount
- One SL-B26 battery pack and USB cord
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 is the difference between the Streamlight ProTac HL-X Pro and the standard HL-X?
Both produce the same 1000 lumens and 50,000 candela beam, but the Streamlight ProTac Rail Mount HL-X Pro adds the Jack-Cap tail cap with redundant push-button and remote switching, and this 88127 kit includes the SL-B26 USB rechargeable battery.
Is the Streamlight ProTac HL-X Pro rechargeable?
Yes — the Streamlight ProTac Rail Mount HL-X Pro USB is supplied with an SL-B26 USB rechargeable battery pack and cord, and will also run on two CR123A lithium cells as a backup.
What rail does the Streamlight ProTac HL-X Pro fit?
The Streamlight ProTac Rail Mount HL-X Pro fits MIL-STD-1913 Picatinny rails directly, and an M-LOK mount is included for M-LOK handguards.
How long does the low mode run on the Streamlight ProTac HL-X Pro?
The 60 lumen low mode on the Streamlight ProTac Rail Mount HL-X Pro runs for up to 24 hours on the SL-B26 pack, or 21 hours on two CR123A cells.
Is this the tan version of the Streamlight ProTac HL-X Pro?
No — part number 88127 is the black Streamlight ProTac Rail Mount HL-X Pro USB; the Desert Tan USB version is a separate part number, 89028.
