Surefire M640DFT Dual Fuel Turbo Scout Light
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SureFire
Overview
The Surefire M640DFT Dual Fuel Turbo Scout Light is a powerful flashlight designed for tactical applications, delivering an impressive output of 1500 lumens. It operates on either two CR123A 3V Lithium batteries or a single 18650 3.6V Li-Ion rechargeable battery, providing versatility in power options. The light is constructed from durable aluminum and is compatible with M-LOK and Picatinny mounting systems, making it easy to integrate into your AR-15 setup. This light is commonly found in builds with a pistol gas system chambered in 5.56 NATO.
Specifications
August 2026 on GunPartPicker
Surefire M640DFT Dual Fuel Turbo Scout Light ranked #23 of the 91 weapon lights builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #23 of the 204 weapon lights builders have added. Builds with this weapon light are nearly all chambered in 300 Blackout, split between carbine-length (50%) and pistol-length (50%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 9 retailers we track have it in stock. It dipped to $296.49 at Ammunition Depot for a stretch in August 2026, well under its usual $368 to $377, so sales do come around. Buying today, the lowest price is $339.49 at Optics Planet, above August's low of $296.49, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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Read the guide: AR-15 Weapon Light Guide →Frequently Built With
The part most often added in each category by the 21 builds that include this one
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 2 →Builds in the community that include the Surefire M640DFT Dual Fuel Turbo Scout Light
| Build | Parts | Total |
|---|---|---|
 | 19 | $2914.54 |
 | 28 | $4083.79 |
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