How to Zero an ACOG Scope » ACOG Zero Target

How to Zero an ACOG Scope

Are you having a hard time trying to zero an ACOG sight? You are in the right place. In this brief post, we will share the simple steps you need to follow if you want to zero an ACOG sight. As you will quickly find out, it is not a complicated process, but requires a lot of practice.

It is important to learn how to properly zero a Trijicon Advanced Combat Optical Gunsight (ACOG) scope to ensure you hit all the targets. Zeroing is the process of adjusting a weapon sight until the point of aim (POA) is the same as the point of impact (POI).

ACOG optical sighting systems are popular because they allow for quick target acquisition using an illuminated reticle. The reticles come in different shapes such as a chevron, triangle, crosshair, or circle.

If an ACOG is zeroed, you can hit a target with a given degree of accuracy (MOA). It is worth mentioning that MOA is different for each weapon and type of ACOG you are using.

What Do You Need?

Here are the items you need:

  • ACOG
  • Flathead screwdriver
  • Table
  • Weapon rest or sandbags
  • 2 zeroing target printed with 1-inch squares
  • Binoculars or spotting scope

Steps to Zero an ACOG

Here are the steps you need to follow:

  1. The first step is to unload the weapon and pull it back on the charging handle. You can look aside the receiver to verify if it is unloaded.
  2. After that, place the ACOG mounting base on the rails on top of the receiver. Turn the screws with your fingers, and then tighten the screws one-quarter turn using a screwdriver.
  3. The next step is to unscrew the adjuster caps on the top and right sides of the ACOG. Once you are done, load the weapon with one round, aim it at the target, and fire. This will set the ACOG in place to ensure the recoil does not affect your zero.
  4. The next step is to set the weapon rest or sandbags on the table. Unload the weapon and walk to the 100-meter target post to mount the target. Go back to the table and mount the weapon in the rest.
  5. After that, load the weapon with a full magazine and fire one round at the center of the target. You can use a spotting scope or binoculars to locate the point of impact.
  6. Approximate the vertical distance from the hole to the center of the target by counting the squares. You need to turn the elevation screw until you hear an audible click. Turn it one click for every 1/4 inch of the distance needed to move the POI. If the POI is high, turn the screw in the D direction. If it is low, turn it in the U direction marked on the scope.
  7. The next step is to approximate the horizontal distance from the hole to the center of the target. This is done by turning the windage screw on the top of the ACOG to adjust the POI. If it is to the right, turn the screw in the L direction. If the POI is to the left, then turn it in the R direction.
  8. Once you are done, fire one round at the center of the target and repeat the adjustment steps if necessary.
  9. Replace the target and repeat the same process. If the shots are clustered within the MOA for the sight and is roughly centered on the middle of the target, your ACOG is zeroed properly.


In summary, we have shared 9 steps on how you can zero an ACOG scope. It is not a complicated process, but it requires a bit of practice to ensure that you have the best shooting experience.

If you are still having a hard time, we recommend consulting a qualified shooting instructor. This ensures that you get the best shooting advice.