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SureFire: M640DFT-PRO Turbo Scout Light Pro
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$377.00
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SKU: M640DFT-BK-PRO
Overview
Built for long-gun use where positive target identification matters at distance, this light pairs a tightly focused Turbo beam with dual-fuel flexibility for field or range setups. The included rechargeable battery supports the highest output figures, while two 123A lithium batteries provide an alternate power option when needed. Its Low-Profile Mount is designed to help position the light around other rail-mounted accessories on MIL-STD-1913 or M-LOK platforms, and the pushbutton tailcap offers instant activation. Rugged aluminum construction, hard-anodized finish, and IPX7 water resistance round out a package suited to hard use without adding unnecessary bulk.
Why Hunters Choose the Surefire
Dual-fuel Design
Supports the included SF18650B battery
Turbo Series
Reflector delivers a tightly focused
Low-profile Mount
MIL-STD-1913 and M-LOK compatibility
Includes Momentary/constant-on
Pushbutton switching with protective shroud
Mil-spec Hard-anodized
Aluminum body and tempered window
Key Features
- Dual-fuel WeaponLight runs on included SF18650B rechargeable battery or two 123A lithium batteries.
- Turbo Series reflector delivers a tightly focused beam for long-range target identification.
- Produces 100,000 candela and 700 lumens with the included SF18650B battery.
- Low-Profile Mount supports MIL-STD-1913 and M-LOK rails, with cleats included.
- Mil-Spec hard-anodized aluminum body and tempered window are built for rugged use.
- IPX7 waterproof rating helps protect the light in wet conditions.
- ZE68 pushbutton switching provides momentary and constant-on activation with protective shroud.
Best Used For
- Long-range target identification on a rifle with rail-mounted accessories
- Hunters needing a compact WeaponLight with focused beam reach
- Users who want dual-fuel flexibility with rechargeable or 123A batteries
- Rifle setups using MIL-STD-1913 or M-LOK rails
- Shooters prioritizing momentary or constant-on activation with remote-switch compatibility
Specifications
| Batteries | One SF18650B rechargeable (incl.) or two 123A lithium |
|---|---|
| Battery Included | Yes |
| Bezel Diameter | 1.258 in (3.19 cm) |
| Blade Finish | Mil-Spec Hard Anodized |
| Body | Mil-Spec hard-anodized aluminum body |
| Construction | Aluminum |
| Distance | 632 meters w/ SF18650B; 600 meters w/ two 123 lithium |
| High Output | 700 lumens w/ SF18650B; 600 lumens w/ two 123 lithium |
| Length | 5.9 in (15 cm) |
| Liquid Ingress Protection | IPX7 |
| Mount | Low-Profile Mount (LPM) |
| Output Notes | SF18650B battery required for 700-lumen output, 100,000 candela, 2.75-hour runtime, and 632-meter beam distance |
| Peak Beam Intensity | 100,000 candela w/ SF18650B; 90,000 candela w/ two 123 lithium |
| Rail Compatibility | MIL-STD-1913 and M-LOK |
| Remote Switch Compatibility | Compatible with a host of SureFire accessory remote switches |
| Runtime | 2.75 hours w/ SF18650B; 1.75 hours w/ two 123 lithium |
| Switching | Click tailcap |
| Waterproof Standard | IPX7 waterproof test standard at 1 meter for 30 minutes |
| Weight W Batteries | 5.5 oz (156 g) |
| Window | Tempered window |
Pros
- Dual-fuel design supports the included SF18650B battery or two 123A lithium batteries.
- Turbo Series reflector delivers a tightly focused beam for long-range target identification.
- Low-Profile Mount offers flexible positioning with MIL-STD-1913 and M-LOK compatibility.
- Includes momentary/constant-on pushbutton switching with protective shroud.
- Mil-Spec hard-anodized aluminum body and tempered window add rugged construction.
- Meets IPX7 waterproof standard for 1 meter of water for 30 minutes.
Considerations & Trade-offs
- The dual-fuel setup offers flexibility, but output and runtime change depending on whether you use the included SF18650B battery or two 123A lithium batteries.
- The Turbo beam is tightly focused for distance and target identification, so it is less suited to broad area illumination than a wider-pattern light.
- The Low-Profile Mount improves placement options, but setup still depends on rail compatibility and how much space is available alongside other accessories.
- The light is built for rugged use and is IPX7 rated, but that rating still reflects a specific water-ingress standard rather than unrestricted submersion use.
Suggested Comparisons
- Long-gun weapon light
- Dual-fuel tactical flashlight
- Rail-mounted firearm light
- Remote-switch compatible weapon light
Suggested Accessories
- Weapon light mount
- Remote pressure switch
- Rechargeable 18650 battery
- Spare CR123A lithium batteries
Frequently Asked Questions
What power options does the M640DFT-PRO support?
It is dual-fuel and can run on the included SF18650B rechargeable lithium-ion battery or on two 123A lithium primary batteries.
What output does it produce with the included battery?
With the included SF18650B battery, it is listed at 700 lumens and 100,000 candela, with a 2.75-hour runtime and a 632-meter beam distance.
How does output change with two 123A batteries?
With two 123A lithium batteries, it is listed at 600 lumens, 90,000 candela, a 1.75-hour runtime, and a 600-meter beam distance.
What mounting systems is this light compatible with?
The Low-Profile Mount includes cleats for both MIL-STD-1913 rails and M-LOK rails.
Is the light rated for water resistance?
Yes. It meets the IPX7 waterproof test standard at 1 meter for 30 minutes.