Streamlight ProTac Rail Mount 1L-X USB Weapon Light 850 Lumens
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
Not sure it fits your rifle? Ask us before you order
The Streamlight ProTac Rail Mount 1L-X USB (89027) is a compact long gun light supplied with the SL-B9 USB rechargeable battery pack and charging cord.
The rechargeable pack is what the USB in the name buys: 850 lumens and 30,000 candela straight out of the box, where the primary-cell version of the same light runs 500.
The body is 6000-series machined aircraft aluminium, black anodised, 4.64 in (11.79 cm) long and 5.22 oz with the SL-B9 fitted or 5.12 oz on a CR123A cell. It is rated IP67 — one metre for thirty minutes — with the tail switch in place, and mounts directly to MIL-STD-1913 Picatinny with an M-LOK mount also supplied. A push-button tail switch handles activation, and TEN-TAP programming sets the order of the modes.
On the SL-B9 pack the light gives 850 lumens, 30,000 candela and a 346 metre beam for half an hour, or 100 lumens, 3,400 candela and 117 metres for four and a half hours on low; strobe runs an hour and a quarter. Dropping in a CR123A lithium cell gives 500 lumens, 18,000 candela and 268 metres for one and three quarter hours, with the same 100 lumen low lasting six and a half. Worth planning around: the headline 850 lumens is the rechargeable figure and it is a thirty minute figure, so carry a spare cell for a long night.
Picatinny rail sections directly, and M-LOK handguards through the supplied mount — so a modern carbine forend is covered either way. The same light with a CR123A cell instead of the rechargeable pack is the ProTac Rail Mount 1L-X, and the version taking a remote switch is the 1L-X USB Pro. Mounting standards are compared in our M-LOK versus Picatinny guide.
| Output (SL-B9) | 850 lumens / 30,000 candela / 346 m for 0.5 h; low 100 lumens / 3,400 candela / 117 m for 4.5 h |
|---|---|
| Output (CR123A) | 500 lumens / 18,000 candela / 268 m for 1.75 h; low 100 lumens for 6.5 h |
| Strobe runtime | 1.25 h on SL-B9, 2.5 h on CR123A |
| Battery | One SL-B9 USB rechargeable pack (included) or one CR123A lithium cell |
| Activation | Push-button tail switch, TEN-TAP programmable |
| Mount | MIL-STD-1913 Picatinny; M-LOK mount included |
| Length | 4.64 in (11.79 cm) |
| Weight | 5.22 oz with SL-B9, 5.12 oz with CR123A |
| Construction | 6000-series machined aircraft aluminium, black anodised |
| Durability | IP67, 1 metre for 30 minutes, with tail switch fitted |
| MPN | 89027 |
A small light with a big candela figure, and the rechargeable pack already paid for. Order the ProTac 1L-X USB 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: Rechargeable Weapon Lights, ProTac 1L-X or browse all Streamlight.
| Brand | Streamlight |
|---|---|
| Part no. | 89027 |
| Category | Weapon Light |
| Barcode | 080926890275 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
Why Onyx Armaments
