Cloud Defensive REIN (Full Size) Weapon Light


(3 customer reviews)

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After over 2 years in development and testing, the REIN is here at last. It represents a quantum leap forward in both performance and critical features that shooters need and rely on. Putting out well over 60,000 Candela at 1,400 lumens, it’s the most powerful weapon light on the market. Available in multiple sizes and multiple configurations, it’s adaptable to your needs. And it’s made here in the USA, by us, in our facility here in southern Indiana.

Standard Kit – push-button only

  • 1 REIN
  • 1 Push-Button tail cap
  • 1 Picatinny Rail Mount for the REIN, with all mounting hardware
  • 1 Cloud Defensive labeled Nitecore Charger
  • 1 Micro USB to USB cord
  • 1 Samsung 30Q 18650 battery

Complete Kit – includes remote switch

  • 1 REIN
  • 1 Remote switch tail cap assembly with integrated push button
  • 2 LCS side plates with hardware
  • 1 Picatinny Rail Mount for the REIN, with all mounting hardware
  • 1 Cloud Defensive labeled Nitecore Charger
  • 1 Micro USB to USB cord
  • 1 Samsung 30Q 18650 battery



REIN is fully compatible with any platform that allows for traditional picatinny, M-LOK (trademark) or KeyMod light mounts. The optional remote switch for the REIN is only compatible with the REIN itself. No reverse compatibility for other light manufactures exists.


  • Precision machined from Certified 6061-T6 aluminum.
  • Type III Anodized to MIL STD. “Hard coat”.


  • A USA-made, state-of-the-art electrical system using the best components that money can buy. That gives us the output, efficiency and run-time that makes REIN the class leader.
  • Uses a single 18650 battery. No CR123 batteries allowed. Use of CR123 batteries VOIDS your warranty. We supply a Samsung 18650 30Q with the REIN. The 30Q battery has more output with shorter run-time of 85-90 minutes. Please note that unlike its peers, REIN will produce useable light for at least 6 straight hours.
  • Accepts ALL protected and unprotected 18650 batteries. Accepts both button-top and flat-top batteries. NOTE: Various battery sizes will require use of the provided Battery Jack feature.
  • Run-time at 100% power is industry-leading.


  • Modular 3-piece design makes the REIN upgradeable over time.
  • Exceeds well over 60,000 Candela.
  • 1,400 Lumens of output.
  • IPX-8 waterproof rating. Fully submersible to 100 ft for 24 hours. Remote switch included.
  • Run-time standard per ANSI/PLATO-FL1 = 130 minutes. The amount of time until the light reaches 10% of its original output.
  • Proprietary Field-Serviceable Lens System. The end-user can now replace the glass lens themselves. The glass on the REIN is 3mm thick, which is the thickest in the industry. It can take multiple hits from 5.56mm Simuntion rounds.
  • S7 Tool Steel bezel ring. Heat-treated to 53 Rockwell. Your light is now an impact tool.
  • Patented Battery Jack feature. This allows you to properly tension the battery inside the system to avoid battery bounce. This lengthens the life of your system and increased reliability substantially.
  • Patented tail-cap cartridge is easily replaceable and allows for multiple configurations without removing the tail of the light.
  • REIN comes standard with a push-button-only configuration. Located in the tail cap, the switch offers both momentary-on and constant-on capability.
  • Patented remote switch (optional). Offers both momentary and constant-on functionality. The remote switch is electrically isolated from the push-button switch located on the tail cap. If your remote switch suffers catastrophic failure, your REIN still works via the tail cap button.
  • The optional remoted switch is housed in a 3rd Generation Light Control System. Available only for the REIN. It offers unprecedented cable management possibilities never before available even with prior generation LCS units. The remote switch is fully submersible and fully potted.
  • The optional remote switch utilizes a cable exit from the tail cap that is perpendicular to the bore axis. This allows your cable to be protected from potential snags and impact.
  • The optional remote switch wire is over-molded into the tail cap cartridge. And the tail cap body allows for the user to adjust the position of the tail cap based on user requirement or preference.
  • The optional remote switch cable is 5” long.
  • Shockproof. Dustproof.
  • Lifetime Warranty – with only a few exceptions. Remote switches are considered replaceable items not warranty items. Please see warranty info for full details.
  • Made in the USA. Manufactured and assembled in-house at our production facility.


  • CANDELA 60,000
  • LUMENS 1,400
  • LENGTH 6.14″
  • WEIGHT without battery 5.3 oz.
  • WEIGHT with battery 6.9 oz.
  • BATTERY 18650

Additional information

Weight 16.02 oz
Dimensions 6 × 4 × 5 in

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Complete (includes tape switch), Standard

3 reviews for Cloud Defensive REIN (Full Size) Weapon Light

  1. makesh_wars (verified owner)

    Not an inexpensive light, but for what you get in performance and included hardware, worth the price.

  2. Jason (verified owner)

    The CD Rein is a great light. Plenty of throw for longer PIDs when used with LVPO or regular scopes. The full kit comes with everything. No extra stuff to hunt down and buy. The pressure switch is well thought out. It can be turned to have either button set to where your thumb falls. I set my switch up for the momentary only to be nearest my thumb. The constant on switch has the CD logo on the pressure pad. Easy to tell which is which without looking. I used a IWC mlok mount to tuck the light to the rail. I can easily see my steel targets at 150-175yrd with the Rein and my Trijicon Credo 1-6. The light works great with my NF NX8 4-32 on my bolt gun. With better glass, the light’s candela will real show. The build quality of the light and ease of use really shows that the guys at CD really tried engineer the best light they could.

  3. Darrin (verified owner)

    Clouds reputation for quality speaks for itself, this light is incredibly solid and from the short amount of time I’ve spent with it I am 100% happy with my purchase. BTO as always had fast shipping, another flawless purchase.

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