




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