Cloud Defensive LCS Streamlight Light Control System


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The Light Control System (LCS) is very versatile. As such, there are a lot of possible configurations.



(2 customer reviews)

The Light Control System (LCS) is very versatile. As such, there are a lot of possible configurations.

The LCS for the Streamlight does not support M-LOK or KeyMod interfaces. We only offer a Picatinny version. Also, the LCS does not support the TLR-series switches.

If you would like, you can add a Streamlight Rail-Mount HLX weapon light to your LCS to save money. This combo gives you a new in-the-box HLX and our LCS. Everything you need for a complete weaponlight setup. That includes the light, the tape switch, the tailcaps, and of course our LCS.




Streamlight® Picatinny

The LCSmk2k is designed exclusively for the Streamlight ProTac series weaponlights Dual-Function tape switch that is commonly provided with the Streamlight ProTac series weaponlights. The LCSmk2k is TOO LONG for the shorter Streamlight 69132 switch provided with the TLR-series.


  • Precision CNC machined from Certified 6061-T6 billet aluminum for superior strength.
  • Mil-Spec Type III hardcoat anodized finish for superior durability and wear resistance.
  • Custom-manufactured size 8-32 Torx-drive screw. Made from hardened steel and then black nitride plated for superior corrosion resistance.


  • Unique Patent-Pending design utilizes a slot that ensures a snug, perfect friction-fit for the tape switch. Once installed its not coming out unless you want it to.
  • “Early Exit” feature allows the user to route the cable into the LCS and then exit the mount early if more cable slack is needed for your given setup.
  • 3-piece clamp design allows for perfect fit across all picatinny rails.
  • Proprietary Integrated Cable Channels (ICC) are integrated into both sides of the mount, giving the user the ability to control excess cable and making the mount ambidextrous and reversible. Channels can be used for other cable management as well (IR, et)
  • Full-length aluminum base allows for optimum tape switch engagement. No “give” in the tape switch when depressed makes for easier and more positive light engagement.
  • Shooter can fully use the entire length of the tape switch now.
  • The LCS Series Locks up 100% to your weapon. Zero movement. Zero play. Virtually indestructible.
  • Radiused/chamfered edges ensure comfort and ergonomic function.
  • Fully ambidextrous and reversible. The LCS be mounted in either direction, based on your preference/needs.



Streamlight® Picatinny

  • WIDTH 1.32″
  • HEIGHT 0.575″
  • LENGTH 3.5″
  • WEIGHT 1.9 oz.

Additional information

Weight 2 oz

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2 reviews for Cloud Defensive LCS Streamlight Light Control System

  1. gjeverett98 (verified owner)

    Shipping was incredibly fast and customer service was great!

    A quick note, however. The design of the LCS must have changed because the one I received no longer shows the version number or have the indents at the top in the pictures. Still functions as intended, however!

  2. joe.secreto (verified owner)

    Great alternative mounting system over the stock adhesive tape Streamlight sends with the light. Very easy to install. As always, super fast shipping and great customer service from Big Tex!

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