This is the USB rechargeable package of the base (non-Pro) model in Streamlight's 2026 ProTac Rail Mount 1L-X series. It's a compact, multi-fuel tactical weapon-mounted light designed for short-barreled rifles (SBRs), AR pistols, carbines, and submachine guns with limited rail space. The 89027 includes the SL-B9 rechargeable battery and USB cord for out-of-the-box convenience, while using a straightforward standard push-button tail cap (no remote switch capability or Jack-Cap®).
Key Features & Specs
- Light Output (varies by battery):
- With included SL-B9® rechargeable Li-Ion battery pack (USB-C charging): High — 850 lumens; Low — 100 lumens; Strobe.
- With CR123A lithium battery (compatible, not included): High — 500 lumens; Low — 100 lumens; Strobe.
- Beam Performance: Strong candela for effective throw and target identification.
- SL-B9: 30,000 candela / 346 m (1,135 ft) beam distance (High).
- CR123A: 18,000 candela / 268 m (879 ft) beam distance (High).
- Low mode: 3,400 candela / 117 m across both batteries.
- Modes & Programming: TEN-TAP® programmable switch with three user-selectable programs (factory default: High/Strobe; options: High Only or Low/High). Simple one-handed operation.
- Controls: Standard push-button tail cap for momentary-on or constant-on activation. No remote pressure switch port (unlike the Pro models 89024/89025).
- Mounting: Includes MIL-STD-1913 (Picatinny) rail mount and M-LOK® kit with hardware. One-handed snap-on/tighten interface. Low-profile design fits tight rails.
- Build Quality: 6000-series machined aircraft aluminum with anodized finish. Gasket-sealed glass lens. Impact-resistant (2 m drop). IP67 waterproof rating (submersible to 1 m for 30 minutes) with the standard push-button switch.
- Power: Multi-fuel — includes (1) SL-B9® protected Li-Ion USB rechargeable battery pack + USB cord. Also accepts (1) CR123A. Run times (approximate):
- High (SL-B9): ~30 minutes (0.5 hrs)
- Low (SL-B9): ~4.5 hours
- High (CR123A): ~1.75 hours
- Low (CR123A): ~6.5 hours
- Strobe: ~1.25 hrs (SL-B9) / ~2.5 hrs (CR123A)
- Size & Weight: Length: 4.64 in (11.79 cm). Weight: ~5.12 oz (145 g) with CR123A; ~5.22 oz (148 g) with SL-B9.
- Additional: Limited lifetime warranty. Serialized. CEC compliant (USB model). Optimized for law enforcement, military, home defense, and tactical use on compact firearms.
The 89027 is the most affordable USB option in the series — it delivers the same high-output performance and multi-fuel flexibility as the Pro USB (89025) but without the Jack-Cap® redundancy or included remote switch. It's ideal for users who prefer simple push-button operation and rechargeable convenience with CR123A as a reliable backup. Early feedback praises its compact size, bright focused beam, and solid Streamlight build quality for short-rail platforms.
Quick Series Comparison
- 89027 (this model): Standard tail switch + SL-B9 USB included.
- 89025: Pro (Jack-Cap® + remote switch) + SL-B9 USB included.
- 89026: Standard tail switch + CR123A included.
- 89024: Pro (Jack-Cap® + remote switch) + CR123A included.
Who It's For
- Owners of SBRs, AR pistols, or compact carbines needing a low-profile light without a pressure pad.
- Tactical users wanting rechargeable convenience (for training/range) with CR123A backup (for long-term storage).
- Anyone prioritizing simplicity and value in a compact weapon light.
