This review and testing guide covers the Viridian 4LUX 2K DUO, an M-LOK compatible angled foregrip featuring a bright green laser and powerful LED light. The expert instructor demonstrates mounting, operating various modes (laser only, bright/dim light, strobe with laser), and conducts both daylight and night-time live-fire tests. The review highlights the device's robust performance under recoil and its exceptional brightness, making it suitable for extended range use in low-light conditions.
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