The Holosun Laser & WeaponlightsG is a class IIIa visible green laser aiming device with a coaxial mounted class 2 IR (infrared) laser and IR illuminator for use with night vision devices and a 600-lumen white light. The LS420G features a 7075-aluminum matte black anodized housing with a quick release Picatinny rail mount. The LS420G is powered by two CR123 battery which can provide up to 5000 hours of battery life.

The rear facing selector switch lets the user select between visible low, visible high, IR high, IR illuminator, or IR high with IR illuminator, white light, or white light with visible laser using the included remote pressure switch or turn the unit OFF. The LS420G also includes a top mounted activation button and tactile windage and elevation adjustments for a precision zero.