Buy the FOURSEVENS Maelstrom MMU

Manufacturer: FOURSEVENS
Mfr. Part #: MMU-AA
UPC: 6894660428014
Original Price: $129.17
Sale Price: $83.96
Stock Status: In Stock
2 item(s) available
On Sale Free Shipping

Click HERE for the 26650 battery for the Maelstrom MMU.
Click HERE for the FOURSEVENS Smart Charger for the 26650 battery.

This flashlight DOES NOT INCLUDE a battery and a charger.

The FOURSEVENS Maelstrom MMU (formerly known as the 4Sevens Maelstrom S12) is the new benchmark for ultra compact, insanely bright tactical and duty flashlights. It is the smallest flashlight in the world to use the SST-90 LED emitter.

The Maelstrom MMU features both current and thermal regulation - this means it can take serious abuse and be exposed to harsh conditions, but it will automatically control its output to protect its own guts. That means you don't worry about your flashlight - you just use it.

The Maelstrom MMU also runs off one of FOURSEVEN's own special lithium-ion rechargeable batteries. It's called a 26650 (not included), and it packs enough energy to power the Maelstrom MMU at 800 lumens for an entire 90 minutes!

The two output modes that the Maelstrom MMU has two output modes that are easily accessible by either tightening the tailcap or depressing the tailcap, for a "momentary on" mode.

The output modes are:

Low (120 lumens, 13 hours)
High (800 lumens, 1.5 hours)

The Maelstrom MMU has a crenulated strike bezel. The optical-grade glass lens is sapphire coated on the outside, with an anti-reflective coating on the inside for both optimal light transmission and durability. The flashlight also features a smooth reflector, meant for illuminating objects far away.

The Maelstrom MMU includes a custom molded carry pouch designed to help retain the light even when flap is open. It also includes spare o-rings.

FOURSEVENS flashlights come with a 10 Year Warranty against defects! Such an outstanding policy shows that FOURSEVENS is a company you can trust.

If you need an easy method to carry your new Maelstrom MMU, take a look at the Maelstrom MMU Leather Holster.


The Maelstrom MMU features a simple, two-mode interface that takes only a few seconds to master. To start, please make sure the 26650 battery is inserted with the positive side (+) toward the head. Then, tighten the tailcap fully down and the Maelstrom MMU will turn on. Loosen the tailcap a half-turn, and the flashlight will turn off.

The Maelstrom MMU tailcap has a pressure-style switch. When the tailcap is loosened a half-turn, simply press the button on the back to activate the light. The switching mechanism is momentary, which means when you stop pressing on the button, the flashlight will turn off. To 'lock' the Maelstrom MMU on, simply tighten the tailcap fully down again.

To switch between the high and low output modes, turn the Maelstrom MMU off, and then turn it on again within 1 second. Anytime the flashlight is turned on within 1 seconds of being turned off, it will automatically switch to the next mode. However, if you leave the flashlight off for 2 seconds or longer, it will "memorize" the last mode used. See the examples below:

Example 1: ON (High mode) --- OFF (1 Second) --- ON (Low Mode)
Example 2: ON (High mode) --- OFF (2 Seconds) --- ON (High mode)

Weight with Batteries 9.0 oz
Weight without Batteries 5.5 oz
Length 5.4 in
Head Diameter 1.8 in
Body Diameter 1.3 in
Bulb/Emmiter SST-90 LED
Operating Voltage Range 3.0V - 4.2V
Battery 26650
Battery Amount 1
Max/Min Output 800 lumens/120 lumens
Max/Min Runtime 13 hours (Low)/1.5 hours (High)
Modes Low, High
Switch Twist Tailcap
Color Black
Finish Type III Hard Anodized
Material Aluminum
Includes Maelstrom MMU, Carry Pouch, Spare O-rings

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