Streamlight ProTac Rail Mount 1L-X USB Pro - 850 Lumens - SL-B9 - Black

The Streamlight ProTac Rail Mount 1L-X USB Pro is the SL-B9 rechargeable variant of the 1L-X Pro — the same 850-lumen Jack-Cap compact rifle light with TEN-TAP programmable modes and M-LOK mount kit, shipped with a SL-B9 USB rechargeable battery pack and USB cord instead of a CR123A primary for users who prefer a rechargeable-first power solution.

The Streamlight ProTac Rail Mount 1L-X USB Pro is a compact tactical light for short-barreled rifles, carbines, and submachine guns delivering up to 850 lumens / 30,000 candela / 346-meter beam distance on high. It features a Jack-Cap tail cap for push-button or remote pressure switch activation, TEN-TAP programmable operating programs, and multi-fuel compatibility. Ships with one SL-B9 USB rechargeable Li-Ion battery pack, USB cord, Jack-Cap, M-LOK kit, momentary switch, and hardware. Also accepts CR123A lithium batteries.

The distinction between this variant and the CR123A version is the included power source: the USB Pro ships with an SL-B9 rechargeable Li-Ion battery pack and USB cord, making it the correct choice for users who want a sustainable daily-use rechargeable solution and are set up for USB-C charging in their kit management routine. The SL-B9 delivers 850 lumens on high with a 0.5-hour runtime at maximum output; the CR123A primary (separately available) delivers 500 lumens at 1.75 hours — the multi-fuel design allows the shooter to choose between maximum brightness with the rechargeable pack or longer runtime with a primary battery depending on the situation. Low mode provides 100 lumens at 4.5 hours (SL-B9) or 6.5 hours (CR123A). All other performance specifications are identical to the CR123A variant: the same Jack-Cap tail cap providing push-button and remote pressure switch redundancy, the same TEN-TAP programmable operating programs (High/Strobe default, High Only, or Low/High), the same M-LOK mount kit included alongside the Picatinny rail clamp, and the same 4.64-inch compact profile optimized for SBR and carbine use. The 6000-series machined aircraft aluminum construction with anodized finish and gasket-sealed glass lens provides the durability required for a hard-use rifle platform. IP67-rated with standard push-button switch; IP54-rated with remote pressure switch installed.

High: 850 lm (SL-B9) / 500 lm (CR123A). Candela: 30,000 / 18,000. Beam: 346m / 268m. Runtime high: 0.5h (SL-B9) / 1.75h (CR123A). Low: 100 lm, 4.5h (SL-B9) / 6.5h (CR123A). Battery: SL-B9 included; CR123A accepted. Tail cap: Jack-Cap (push-button + remote switch). TEN-TAP: 3 programs. Length: 4.64 in. Weight: 5.5–5.6 oz. IP67 (push-button) / IP54 (remote switch). Includes: SL-B9 pack, USB cord, Jack-Cap, M-LOK kit, momentary switch, hardware.

SL-B9 USB rechargeable battery pack included — the correct power solution for users with USB-C charging in their kit rotation. Jack-Cap tail cap provides push-button and remote pressure switch operational redundancy. M-LOK mount kit included alongside Picatinny clamp. Multi-fuel CR123A compatibility retained as backup fuel source.

The right compact rifle light for SBR and carbine users who want the 1L-X Pro's Jack-Cap redundancy and M-LOK kit in the SL-B9 rechargeable configuration — 850 lumens, TEN-TAP programmable, USB-C chargeable, and suppressor-platform sized.