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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
Available Merchants(10)
Prices checked
Price Alert
October 2026 on GunPartPicker
Surefire M640DFT Dual Fuel Turbo Scout Light ranked #15 of the 101 weapon lights builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #19 of the 257 weapon lights builders have added. Builds with this weapon light are mostly chambered in 5.56 NATO (67%, then .223 Wylde 19%), mostly on mid-length gas (63%, then carbine-length 25%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 6 of the 10 retailers we track have it in stock. It dipped to $339.49 at Optics Planet for a stretch in October 2026, under its usual $377, so sales do come around. Buying today, the lowest price is $358.49 at Optics Planet, above October's low of $339.49, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 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 builds that include this one
Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Anodized Black - MK2AL
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Geissele Automatics Airborne Charging Handle Black
EOTECH EXPS3-0 Holographic Weapon Sight
B5 Systems SOPMOD Government, Mil Spec, Coyote - SOP1352
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Surefire M640DFT Dual Fuel Turbo Scout Light
| Build | Parts | Total |
|---|---|---|
| Griffin Armament 11.5" Multi AR-15 Build | 26 | $3880.80 |
| Griffin Armament 11.5" Multi AR-15 Build | 21 | $4066.92 |
| - | 9 | $5336.51 |
| - | 9 | $5336.51 |
 | 19 | $2781.04 |
 | 28 | $3973.77 |
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