Quark QK2A MKIII (2xAA)



Out stock

The classic Quark, modernized.

introducing the quark qk2a mkiii

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210 hr

1.5 hr


It was a huge responsibility to take something so good and improve upon it, but that’s just what we’ve done.

The Quark was the first commercially produced "high output" LED flashlight on the market. When the Quark flashlight hit the scene some 10 years ago, it completely shattered the mold and ushered in the era of modern EDC (Every Day Carry) flashlights. It put the Foursevens brand (and founder David Chow) on the map as an innovation leader in the world of EDC gear and spawned a new flashlight form factor that other manufacturers were quick to imitate. 

Since then, the Quark has continuously evolved and the MKIII is intended to continue that legacy. I like to think the Quark is the Porsche 911 of flashlights: some things are so good they don’t need to be re-invented, they just need to be refined. 

When I took over the Foursevens brand from David in 2018, this Quark project quickly became all-consuming. How to take my 10 years of experience designing high-end custom flashlights and combine them with the decade David spent reiterating and refining the brand’s flagship?

The next generation Quark is the best yet, and I’m thrilled to have the opportunity to get one into your hands.

What's new with the Quark MKIII

  • User interface: Quarks now feature a configurable user interface that is being standardized across the entire Foursevens line. No matter what light you pick up, you'll know exactly how to use it. Details below. 
  • Pocket clip: The new clip is a thicker material, provides easier pocketing, and improved grip. Old-style "deep carry" clips are also available as an accessory. 
  • Body Machining: The diameter of the entire light is *very* slightly larger to improve mechanical reliability and impact resistance. Otherwise, it's the same old Quark you know and love. 
  • Tail Switch: All Quarks ship with the traditional forward ("tactical") clicky switch that stands proud of the tail. For those who prefer a recessed button and a light that can tailstand, we also include the all new snap-on Quark Tailstand Cap. 
  • Nichia LED: The MKIII features the newest Nichia 319A with 5000K color temperature and 80+ CRI. It's meant to strike the perfect balance between beam quality and output. 
  • Hybrid Memory: A blend of memory and no-memory, the hybrid configuration saves the last mode used, but reverts to the first mode in the sequence when shifting out of a saved mode.    
  • Solid Copper (Direct Thermal) MCPCB: The LED is mounted to a solid copper PCB to provide superior thermal performance and maximum output.  
  • DIY Friendly: *warning-nerd content* This industry was created by individual makers and modders working at home on their kitchen tables. People who love tinkering, technology, and flashlights! Unlike most industries, flashlights have been driven by the little guys and we intend to honor that tradition. Most manufacturers (including Foursevens in the past) glue or thread lock on certain components so they cannot be disassembled without a lot of effort and/or destroying the light. This was to prevent people from tinkering. I say tinker on my friends!


  • Standard includes 2x Rechargeable AA NiMh Batteries
  • Combo adds a GP USB Charger with 4xAA NiMh Batteries


  • 2x GP rechargeable NiMh batteries included! 
  • Current Regulation
  • Reverse polarity protection
  • Nichia 319A (5000K / 80+ CRI)
  • Water Resistance = IPX8


All Quarks feature a new interface with six selectable configuration modes so you can customize your Quark specifically to your needs.

  • Output in programming mode = 15% (medium)
  • Bump Protection = <60ms off time = no mode change
  • Enter configuration menu = 10 cycles within 3 seconds.  
  • Mode change interval: .5 seconds
  • Memory set (off) time = .5 seconds  
  • Memory function = revert to mode 1 
  • Burst Mode Memory = no memory
  • Burst mode behavior = 30 seconds burst (100% output), ramp to high mode (60%) over next 30 seconds.

What's up with burst mode? : This feature is ported over from the flagship Prometheus Alpha Flashlights. It allows you to access maximum output at any time without scrolling through other modes. This also allows you to have maximum output when you need it, but conserve battery by using the standard high mode (60% output) for normal use.

Burst mode is activated with two very fast off/on cycles (.2 second spacing) and does not have mode memory. Burst is active for 30 seconds and then ramps down to high mode over the following 30 seconds. This is to prevent the light from overheating and damaging the LED, electronics, or battery wrapper.  


All Quarks are initially set to Configuration 3 with Medium/High/Burst. They can be reconfigured as often as you'd like.

Here are the possible configurations:

  • Config. 1: High - (Burst 100%)
  • Config. 2: Max (100%) - Strobe
  • Config. 3: Medium - High - (Burst)
  • Config. 4: Low - Medium - High - (Burst)
  • Config. 5: High - Medium - Low - (Burst)
  • Config. 6: Low - Med - High - Strobe - SOS - Beacon - (Burst)


    • Operating your Quark is simple. Make sure that the battery is inserted with the positive side (+) toward the head.
    • To turn it on press or click the tailcap button. A press allows momentary activation of the light. 
    • A quick off/on cycle changes modes
    • Two very quick off/on cycles activates burst mode
    • Enter configuration mode with 10 on/off cycles in less than 3 seconds. The light will begin to blink a number of times corresponding to the selected configuration. For example if you are in Config. 3: 3 blinks, pause, 3 blinks. If there is no input for 5 seconds the light will exit configuration mode. 
    • Turn the light off for 5 seconds to save the current configuration to memory
      Dimensions Length: 5.8 inches
      Diameter: 0.88 inches
      Weight (with batteries): 4.2 oz

      LED Emitter Nichia 319A (5000K / 80+ CRI)
      Voltage range 0.9V-3.0V (NO Lithium Ion Rechargeable!)
      Beam Distance 145m
      Brightness Levels Low (Moonlight): 1.5 lumens, 210 hrs
      Medium: 80 lumens, 8 hrs
      High 300 lumens 1.5 hrs
      Max/Burst 500 lumens, 1.25 hrs
      Special Modes Strobe
      Reflector Textured
      Body Material Type-III hard-anodized 6061-T6 aluminum
      Lens Material Optical-grade glass lens with antireflective coating on both sides
      Water Resistance IPX8
      Included Accessories 2xAA NiMh Rechargeable batteries, spare o-rings, Tailstand Cap
      Where it's Made
      Back To Foursevens

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