Viridian 4LUX 2K DUO Foregrip Review & Shoot

Published on March 10, 2026
Duration: 8:51

This guide details the installation and basic operation of the Viridian 4LUX 2K DUO foregrip, an M-LOK compatible accessory featuring an integrated flashlight and green laser. It covers mounting procedures, mode selection, and safety considerations for use on an AR-style rifle. The review highlights its performance in both daylight and nighttime conditions, noting its brightness and effectiveness at various distances.

Quick Summary

The Viridian 4LUX 2K DUO is an M-LOK compatible foregrip featuring a powerful flashlight (up to 1,850 lumens) and a bright green laser. It offers multiple modes, mode memory, USB-C charging, and extended run times, making it a versatile accessory for tactical applications and low-light conditions.

Chapters

  1. 00:00Product Introduction
  2. 00:14Unboxing & Specs Overview
  3. 01:13Initial Product Impressions
  4. 02:00Operating Modes & Features
  5. 02:57Mounting & Hardware
  6. 03:15Shooting Test Plan
  7. 03:34Live Fire Testing
  8. 05:43Night Performance Test
  9. 07:27Ergonomics and Final Thoughts

Frequently Asked Questions

What are the key features of the Viridian 4LUX 2K DUO foregrip?

The Viridian 4LUX 2K DUO is an M-LOK compatible foregrip featuring an integrated flashlight with 1,850 lumens (high) and 685 lumens (low) output, a green laser, multiple operating modes including strobe, mode memory, and both constant-on and momentary activation via a pressure switch. It is rechargeable via USB-C and made in Minnesota.

How does the Viridian 4LUX 2K DUO perform in low light and darkness?

In darkness, the Viridian 4LUX 2K DUO effectively illuminates areas up to 50 yards with its bright white light. The green laser is also clearly visible at this distance, making it a capable tool for target acquisition and navigation during night operations.

What are the power and run time specifications for the Viridian 4LUX 2K DUO?

The Viridian 4LUX 2K DUO operates on a rechargeable battery, offering 90 minutes of run time on low (685 lumens) and 78 minutes on high (1,850 lumens). It also supports an external battery pack (4i SAFE CHARGE) for extended use.

Is the Viridian 4LUX 2K DUO easy to install and operate?

Yes, the foregrip mounts via M-LOK and includes necessary hardware. Operation is intuitive with distinct buttons for mode selection and activation, and the pressure switch allows for momentary use. Mode memory simplifies returning to a preferred setting.

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