The Streamlight ProTac Rail Mount 1L-X USB Pro, part 89025, is the top specification of the compact 1L-X rail light, supplied with the Jack-Cap tail cap, a momentary remote pressure switch and an M-LOK kit.
The Jack-Cap is what you are paying for: it runs a push-button and a remote pressure switch at the same time, each working on its own, so one failing does not put the light out of action.
The body is 6000-series aircraft aluminium, black anodised, 4.64 in (11.79 cm) long and 5.5 to 5.6 oz depending on the cell, behind a BOROFLOAT lens. It is rated IP67 with the push-button fitted and IP54 with the remote in place. In the box are the light, the Jack-Cap, the momentary pressure switch, the M-LOK kit, a hardware kit, a 2.5 mm Allen wrench, an SL-B9 rechargeable pack and a USB cord.
On the included SL-B9 pack it gives 850 lumens and 30,000 candela for a 346 metre beam, running half an hour on high or four and a half hours on the 100 lumen low setting, with a 1.25 hour strobe. Drop in a CR123A lithium cell instead and the same light gives 500 lumens and 18,000 candela for 268 metres, running 1.75 hours on high, 6.5 hours on low and 2.5 hours in strobe. That is the honest caveat behind the headline number: 850 lumens is an SL-B9 figure, not a CR123A one. TEN-TAP programming sets the mode order.
Why shooters choose the 1L-X USB Pro
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Output on SL-B9 — 850 lumens, 30,000 candela, 346 metres, 0.5 hours on high
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Output on CR123A — 500 lumens, 18,000 candela, 268 metres, 1.75 hours on high
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Low setting — 100 lumens, 3,400 candela, 117 metres, up to 6.5 hours
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Switching — Jack-Cap tail cap running a push-button and a remote pressure switch independently
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Mounting — MIL-STD-1913 Picatinny, with an M-LOK kit supplied
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Build — 6000-series aluminium with a BOROFLOAT lens, IP67 with the push-button and IP54 with the remote
What the 1L-X USB Pro fits
It clamps to a MIL-STD-1913 Picatinny rail as supplied, and the M-LOK kit in the box mounts it directly to an M-LOK handguard. Without the remote switch, the same light is the ProTac 1L-X USB; with a CR123A instead of the rechargeable pack it is the ProTac 1L-X; and our M-LOK versus Picatinny guide covers which interface to use.
Specifications
| Output (SL-B9) |
850 lumens / 30,000 candela / 346 m, 0.5 h |
| Output (CR123A) |
500 lumens / 18,000 candela / 268 m, 1.75 h |
| Low output |
100 lumens / 3,400 candela / 117 m, 4.5 h on SL-B9, 6.5 h on CR123A |
| Strobe |
1.25 h on SL-B9, 2.5 h on CR123A |
| Battery |
SL-B9 USB rechargeable pack included, or one CR123A lithium cell |
| Switching |
Jack-Cap tail cap: push-button and remote momentary pressure switch |
| Programming |
TEN-TAP |
| Mount |
MIL-STD-1913 Picatinny, M-LOK kit included |
| Length |
4.64 in (11.79 cm) |
| Weight |
5.5 to 5.6 oz depending on cell |
| Construction |
6000-series aluminium, black anodised, BOROFLOAT lens |
| Sealing |
IP67 with push-button, IP54 with remote |
| MPN |
89025 |
A short light with two ways to switch it and no single point of failure. Order the 1L-X USB 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 1L-X USB or browse all Streamlight
