Description
The Streamlight ProTac RM HL-X Pro USB (model 88129) is built for anyone who wants serious reach on a long gun without a bulky light hanging off the rail. It cranks out 1,000 lumens and 50,000 candela with a beam that punches out to 447 meters, so you get both a wide, usable spill up close and enough throw to positively identify what's downrange. The low-profile machined aluminum body keeps things trim and out of the way of your other gear.
What Sets the ProTac RM HL-X Pro Apart
This is the multi-fuel setup, which is a big part of the appeal. It ships with the SL-B26 protected lithium-ion USB rechargeable battery pack, so you can top it off with the included cord and skip buying cells. If you'd rather run primaries or want a backup plan in the field, it also accepts two CR123A lithium batteries. On high, expect around 1.75 hours from the SL-B26 pack or 1.25 hours from CR123As, and the low setting stretches runtime way out to roughly 24 hours.
Switching and Programming on the HL-X Pro
The Jack-Cap tail switch is what makes this light flexible. You get push-button operation right out of the box, plus a port so you can add a remote pressure switch later if you want tape-switch control near your support hand. Streamlight's TEN-TAP programming lets you pick from three operating setups: high/strobe, high only, or low/high, so you can tailor it to how you run your gun.
Built to Take a Beating
Streamlight didn't cut corners on durability. The 6000-series aircraft aluminum housing wears an anodized finish, the impact-resistant tempered glass lens is shock mounted, and the light carries an IP67 waterproof rating (down to 1 meter for 30 minutes) with the standard push-button cap installed. It's also been extensively live-fire tested and backed by Streamlight's limited lifetime warranty. The integrated rail clamp locks onto MIL-STD-1913 Picatinny rails, and the included M-LOK kit covers those setups too.
Key Specifications
- Manufacturer: Streamlight
- Manufacturer Part Number: 88129
- UPC: 080926881297
- High Output: 1,000 lumens / 50,000 candela
- Low Output: 60 lumens / 3,100 candela
- Beam Distance: 447 meters (high) / 111 meters (low)
- Battery: SL-B26 USB rechargeable pack (included) or 2x CR123A
- Run Time (High): 1.75 hrs SL-B26 / 1.25 hrs CR123A
- Run Time (Low): Up to 24 hrs SL-B26 / 21 hrs CR123A
- Switch: Jack-Cap tail switch with remote switch port
- Programming: TEN-TAP (high/strobe, high only, low/high)
- Mount: MIL-STD-1913 Picatinny and M-LOK
- Housing: 6000-series machined aircraft aluminum, anodized
- Water Rating: IP67 waterproof with push-button cap installed
- Weight: 6.60 oz
- Color: Black
What’s Included
- ProTac RM HL-X Pro light
- Jack-Cap tail switch
- M-LOK mounting kit
- SL-B26 USB rechargeable battery pack
- USB charging cord
- Mounting hardware and 2.5mm Allen wrench
Frequently Asked Questions
Does the ProTac RM HL-X Pro USB come with a remote pressure switch?
No, the 88129 is the light-only USB version and does not include a remote pressure switch. It ships with the Jack-Cap tail switch, which has a built-in port so you can add a remote pressure pad down the road if you want tape-switch control. If you'd prefer the switch included out of the box, look at the 88127 system version instead.
What batteries does the HL-X Pro run on?
It's a multi-fuel light, and this model comes with one Streamlight SL-B26 protected lithium-ion USB rechargeable battery pack plus a charging cord. It also accepts two CR123A lithium batteries if you'd rather run primaries or keep some as backup. That flexibility is handy when you can't get to a charger.
Will the ProTac RM HL-X Pro mount to both Picatinny and M-LOK?
Yes. The integrated rail clamp attaches directly to MIL-STD-1913 Picatinny rails, and the included M-LOK kit lets you mount it to M-LOK compatible handguards. The 2.5mm Allen wrench you need is in the box, so you're set to install it right away.
How far will the ProTac RM HL-X Pro throw light?
On high it puts out 1,000 lumens and 50,000 candela with a rated beam distance of 447 meters, which is plenty of reach for a long gun light. The reflector gives you a tight center beam for distance while still spilling enough light around it for close work. Drop to the 60-lumen low mode and you'll stretch runtime way out for lighter tasks.





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