Cloud Defensive REIN 1.0 Weapon Light – 18650 Full Size


Flat Dark Earth (FDE)
Clear Anodized

Product Description

REIN is fully compatible with any platform that allows for traditional picatinny, M-LOK, or KeyMod scout-style 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.
  • The 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 a catastrophic failure, your REIN still works via the tail cap button.
  • The optional remote 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.
  • Made in the USA.


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




Technical Information

Mounting Platform









Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit

Customer Reviews

Based on 6 reviews
Carter W.
Cloud defensive rein

Fantastic light. Built like a tank. If weight is a concern for you, go with the mini. Overall the performance is exceeding my expectations.

James D.
Great WML

The REIN is a rugged light with fantastic light output. The wire management system for the remote switch is the best in the business, simple and it works.
Milspec Retail’s processing and shipping time was outstanding.

CD REIN!!! 5 star product!!

If you want the brightest light in the game currently, then this is the one.

Fast shipping also.

Cloud Rein!!

Well made product. Integrated switch with hidden cable routing...bulletproof!!! Reviews don’t do this weapon light justice.

Milspec is a pleasure to work shipping and quality gear.

Chad E.
Cloud Defensive Rein

According to my research this was one of if not the best product(s) out there in its category. The light was everything I thought it would be, plus some. The distance this light reaches is like the old school Q-Beams, which is great for me because I live out in the county where I need a light to reach out and properly identify a target.