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Description
A compact multi-fuel tactical weapon light for short-barrelled rifles, carbines and submachine guns, supplied with an SL-B9 battery pack and USB cord.
The ProTac Rail Mount 1L-X USB runs on one Streamlight SL-B9 lithium-ion rechargeable battery pack and also accepts one CR123A lithium battery. On the SL-B9 it delivers 850 lumens and 30,000 candela on high, with a beam distance of 346 m.
The body is 6000 series machined aircraft aluminium with an anodised finish, and the light is IP67-rated, waterproof to 1 m for 30 minutes. It is supplied in black with a tailcap switch, mounting hardware, an M-LOK mount, one SL-B9 battery pack and a USB cord.
Key features
- Multi-fuel power — Uses one SL-B9 lithium-ion rechargeable battery pack or one CR123A lithium battery.
- Two output levels — On the SL-B9, high gives 850 lumens for 30 mins and low gives 100 lumens for 4.5 hrs.
- CR123A performance — On a CR123A, high gives 500 lumens and 268 m for 1.75 hrs, while low runs for 6.5 hrs.
- Strobe function — Strobe runs 1.25 hours on the SL-B9 and 2.5 hours on a CR123A.
- Push-button tail switch — A standard push button tail switch allows easy activation without a pressure pad, and the light is TEN-TAP programmable.
- Picatinny and M-LOK — MIL-STD-1913 Picatinny rail and M-LOK mounts are included.
- Sealed construction — A gasket-sealed glass lens and IP67 rating keep the light waterproof to 1 m for 30 minutes.
- Compact dimensions — It measures 11.79 cm in length and weighs 158.8 g with the SL-B9 battery pack.
Typical applications
- Weapon-mounted illumination for short-barrelled rifles and carbines
- Tactical light for submachine guns in law enforcement and security teams
- Low-light building searches and close-quarters operations
Technical specifications
| Light output, SL-B9 High | 850 lumens / 30,000 candela / 346 m beam distance / 30 mins |
| Light output, SL-B9 Low | 100 lumens / 3,400 candela / 117 m beam distance / 4.5 hrs |
| Light output, CR123A High | 500 lumens / 18,000 candela / 268 m beam distance / 1.75 hrs |
| Light output, CR123A Low | 100 lumens / 3,400 candela / 117 m beam distance / 6.5 hrs |
| Light output, Strobe (SL-B9) | 1.25 hours run time |
| Light output, Strobe (CR123A) | 2.5 hours run time |
| Battery | One Streamlight SL-B9 lithium-ion rechargeable battery pack |
| Mounting | MIL-STD-1913 Picatinny rail and M-LOK® mounts included |
| Compatibility | Short-barreled rifles, carbines and submachine guns |
| Switch | Standard push button tail switch, TEN-TAP programmable |
| Body | 6000 series machined aircraft aluminium, anodised finish |
| Lens | Gasket-sealed glass lens |
| Ingress protection | IP67, waterproof to 1 m for 30 minutes |
| Length | 11.79 cm (4.64 in) |
| Weight | 158.8 g (5.6 oz) with SL-B9 |
| Colour | Black |
In the box
- 1 × ProTac Rail Mount 1L-X USB, black
- Tailcap switch
- Mounting hardware
- M-LOK® mount
- 1 × SL-B9 battery pack
- USB cord
Model information
| Brand | Streamlight |
| Model | ProTac Rail Mount 1L-X USB, Black |
| MPN | 89027 |







