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  4. SureFire M640DFT-PRO Dual Fuel Turbo Scout Light Pro

SureFire M640DFT-PRO Dual Fuel Turbo Scout Light Pro

SureFire M640DFT-PRO Dual Fuel Turbo Scout Light Pro

Manufacturer: SureFire
Category: Weapon Lights & Flashlights
  • High Output 700 lumens
  • High Runtime 2.5 hr (SF18650B), 1.75 hr (CR123A)
  • Batteries 1ร— SF18650B rechargeable or 2ร— CR123A
  • Switching Z68 push-button tailcap (momentary/constant-on)

Full Specifications

1. General Information

Name SureFire M640DFT-PRO Dual Fuel Turbo Scout Light Pro
Manufacturer SureFire, LLC
Country of Origin United States
Type / Role Rail-mounted tactical weapon light
Introduced / Service Entry 2023
Status Active production
Unit Cost MSRP approximately US$399 (dealer pricing varies)

2. Performance

Maximum Output (Recharge) 700 lumens
Maximum Output (Lithium) 600 lumens
Peak Beam Intensity 100,000 candela
Operational Range (Throw) 632 m
Endurance (SF18650B) 2.5 hours
Endurance (2x CR123A) 1.75 hours
Photonic Barrier Pen Excellent, optimized high-candela Turbo beam

3. Dimensions

Length 5.90 in (15.0 cm)
Bezel Diameter 1.26 in (3.2 cm)
Height Varies with mounting position
Maximum Operational Weight 6.1 oz (173 g)

4. Payload & Armament

Illumination Type High-output white LED
Mounting Footprint SureFire Low-Profile Mount (LPM)
Rail Hardware Included MIL-STD-1913 Picatinny and M-LOK mounting hardware
Primary Lens Tempered window with precision smooth parabolic reflector
Switches Supported Z68 push-button tailcap, SureFire remote tape switches

5. Propulsion (Power Subsystem)

Primary Source 1ร— SF18650B rechargeable Li-ion battery (included)
Secondary Source (Dual) 2ร— CR123A lithium batteries
Thermal Regulation Digitally regulated output with thermal management

6. Communication & Control (Activation)

Control Type Z68 push-button tailcap (momentary and constant-on)
Circuit Protection Regulated electronic circuitry
Ingress Protection Rating IPX7, waterproof to 1 meter for 30 minutes

7. Operational Use

Primary Users Military, law enforcement, security professionals, civilian shooters
Combat Proven Scout Light family extensively fielded by U.S. military and law enforcement
Notable Deployment Patrol rifles, AR-platform carbines, precision rifles, special operations weapon systems

Our Rating

The overall rating is based on review by our experts

7.5
  • Accuracy 7 / 10
  • Performance 8 / 10
  • Technology 8 / 10
  • Reliability 7 / 10

PROS

  1. Outstanding 100,000 candela beam intensity for long range identification.
  2. Dual fuel operation provides excellent power flexibility.
  3. Rugged aerospace aluminum construction.
  4. Compatible with SureFire remote pressure switches.
  5. Reliable performance in adverse weather and demanding operational environments.

CONS

  1. Premium purchase price.
  2. Lower lumen rating than some high output flood lights.
  3. Rechargeable battery sold only in SureFire format.
  4. Designed primarily for long throw rather than wide area illumination.
  5. Heavier than compact Scout Light variants.

SureFire M640DFT-PRO

The SureFire M640DFT is a premium dual fuel weapon light designed for military, law enforcement, and civilian defensive applications. Built to provide long range target identification and exceptional beam intensity, the M640DFT combines SureFire’s proven Scout Light architecture with the company’s Dual Fuel Turbo technology. Unlike traditional weapon lights that prioritize flood illumination, the M640DFT focuses on producing a tightly concentrated beam capable of penetrating photonic barriers such as streetlights, vehicle headlights, and urban lighting.

Its durable aerospace aluminum body, weather resistant construction, and compatibility with multiple switching options make it a versatile lighting solution for rifles, carbines, and patrol weapons operating in demanding environments.

Manufacturer

The SureFire M640DFT-PRO Dual Fuel Turbo Scout Light Pro is manufactured by SureFire, LLC, a U.S.-based company headquartered in California. SureFire has supplied tactical illumination systems to the U.S. military, federal agencies, and law enforcement organizations for decades. The M640DFT continues the company’s tradition of producing rugged, mission focused weapon lights built for harsh operational conditions.

Performance, Range and Technology

The SureFire M640DFT operates using either the included SF18650B rechargeable lithium-ion battery or two CR123A lithium batteries, allowing users to choose between rechargeable convenience and field replaceable power.

When powered by the rechargeable battery, the light delivers approximately 700 lumens with an impressive 100,000 candela, producing an effective beam throw of roughly 632 meters. Using two CR123A batteries, output decreases to approximately 600 lumens while maintaining excellent long distance illumination.

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Its precision engineered Turbo reflector concentrates light for superior target discrimination and improved visibility in low light environments. The light mounts directly to MIL-STD-1913 Picatinny and M-LOK compatible systems using SureFire’s Low Profile Mount, and it supports SureFire remote pressure switches for enhanced weapon control during tactical operations.

Cost / Price

The SureFire M640DFT-PRO Dual Fuel Turbo Scout Light Pro typically retails between US$369 and US$429, depending on included accessories, mounting configuration, and retailer. Although positioned in the premium segment, its durability, dual fuel capability, and long service life make it a preferred choice for professional users.

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