Streamlight ProTac Rail Mount 1L-X Pro - 850 Lumens - Jack-Cap - CR123A - Black

The Streamlight ProTac Rail Mount 1L-X Pro is a compact, multi-fuel, high-output tactical light purpose-built for short-barreled rifles, carbines, and submachine guns — 850 lumens and 30,000 candela with TEN-TAP programmable operating modes, a Jack-Cap tail cap for push-button or remote pressure switch redundancy, and an M-LOK mount kit included for rail or M-LOK mounting.

The Streamlight ProTac Rail Mount 1L-X Pro is a compact rifle and carbine weaponlight delivering up to 850 lumens / 30,000 candela / 346m beam distance on high. Multi-fuel: CR123A lithium or SL-B9 USB rechargeable. TEN-TAP programmable for three operating programs. Jack-Cap tail cap supports push-button or remote pressure switch operation. Length: 4.64 in. Weight: 5.5–5.6 oz. Includes Jack-Cap, M-LOK kit, momentary pressure switch, hardware, and one CR123A battery.

The 1L-X Pro targets the SBR, carbine, and SMG segment where overall system length is a constraint and a compact, lightweight light matters as much as output. At 4.64 inches and 5.5 ounces with a CR123A, it adds minimal length and weight to a short platform while delivering 850 lumens / 30,000 candela — the output level that provides meaningful target identification capability at realistic carbine engagement distances. Output on SL-B9 is rated at 850 lumens with a 0.5-hour runtime; CR123A delivers 500 lumens at 1.75 hours — the multi-fuel design allows the shooter to choose runtime over output (CR123A) or maximum brightness for shorter duration (SL-B9). Low output is 100 lumens on both batteries with 4.5 hours (SL-B9) or 6.5 hours (CR123A) runtime. The TEN-TAP programming system allows pre-selection of High/Strobe (factory default), High Only, or Low/High operating programs before the light is mounted. The Jack-Cap tail cap is the defining upgrade over the standard 1L-X: it provides both push-button activation for direct thumb control and a remote pressure switch port for support-hand activation in a firing grip, with the momentary switch included in the kit. The M-LOK mount kit is also included, allowing installation on M-LOK compatible rail systems without a separate mount purchase. MIL-STD-1913 Picatinny rail clamp is the primary mount.

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). Strobe: 1.25h (SL-B9) / 2.5h (CR123A). Battery: CR123A or SL-B9. Length: 4.64 in. Weight: 5.5–5.6 oz. Tail cap: Jack-Cap. TEN-TAP: 3 programs. Includes: Jack-Cap, M-LOK kit, momentary switch, hardware, 1x CR123A.

Jack-Cap tail cap provides push-button and remote pressure switch redundancy — included momentary switch enables support-hand activation in a firing grip. M-LOK mount included for M-LOK rail system mounting without additional purchase. 850/500 lumen multi-fuel output covers maximum brightness (SL-B9) and longer runtime (CR123A) in the same light. Compact 4.64-inch profile minimizes added length on SBR and carbine platforms.

The right compact weaponlight kit for SBR, carbine, and SMG users who want Jack-Cap dual-activation redundancy, M-LOK mounting flexibility, and TEN-TAP programmable output in a 4.64-inch multi-fuel package — pressure switch and M-LOK mount included.