How to Install Trijicon

The Trijicon ACOG (Advanced Combat Optical Guide) is a compact sighting system designed for AR15-style rifles. Available in a wide range of magnifications, the ACOG was originally developed for the U.S. Army for use on the military M16. It uses both radioactive tritium and external fiber optic light gatherers to illuminate the internal red dot reticle for easy visibility in low-light or night conditions. Its large ocular lens allows both-eyes-open aiming. This feature, combined with the bright red dot reticle, facilitates faster target acquisition and quicker shots than a conventional scope. All lighting functions of the ACOG are derived from self-illuminating tritium and transmitted ambient light so no battery or electronics are required. The Trijicon ACOG mounts to the TA60 rail standard on any flat-top civilian AR15-style rifle.

Things You'll Need

  • Phillips screwdriver
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Instructions

    • 1

      Turn the two mounting knobs on the left side of the Trijicon ACOG counterclockwise to expand the mounting clamp bars.

    • 2

      Place the ACOG on the AR15's flat-top mounting rail.

    • 3

      Engage the interface studs on the bottom of the ACOG with the appropriate slots on the mounting rail to provide the most comfortable distance between the ocular lens and your eye in normal sighting conditions.

    • 4

      Finger-tighten the two mounting knobs to tighten the clamp bars. Add an extra quarter turn to each knob using a Phillips screwdriver after finger-tightening.