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  • Post last modified:October 22, 2023

In this blog, we'll give you a step-by-step guide for truing your ACOG with minimal ammo. Additionally, we'll discuss some tips to enhance your accuracy by delving into the finer details of your ACOG.

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How To Zero Trijicon ACOG

Geissele super precision ACOG scope mount

To start, attach your ACOG to your rifle at your preferred eye relief position. While Trijicon suggests hand-tightening, it's advisable to give it an extra firm twist to ensure the mount stays secure, as it can occasionally loosen.

We strongly recommend using either the Geissele Super Precision ACOG mount (providing up to 2800 lbs of clamping force) or the LaRue Tactical QD mount. These mounts come with built-in recoil lugs to prevent any shifts during intense recoil.

Choosing the Correct Zeroing Distance

SCAR 17 with ACOG 3.5X

Many people choose to zero their scopes at 25, 36, 50, or even 100 yards and consider it sufficient. However, if your point of aim and point of impact are slightly off-center, this discrepancy can become more pronounced at greater distances.

This can lead to missed shots when you need accuracy, so it's advisable to fine-tune your point of aim and point of impact, ideally at a minimum of 300 yards.

The goal here is to adjust the ACOG's settings at 300 yards so that your shots are more precise at any distance before reaching 300 yards.

Using the Military Tape Trick

The ACOG prism scope is notorious for its tendency to "bloom" in intense sunlight. This means that the reticle becomes excessively bright, often obscuring your target and making it difficult to maintain a clear point of aim.

To prevent this issue, you can employ the military tape trick, which involves covering the fiber optics. By doing this, you'll have a slender black reticle that enables precise aiming on your targets, particularly when you fine-tune it at 300 yards.

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Collect Initial Shot Group

36 yard poi 45 degrees leaning right

Start by spraying two contrasting colors on your target at 25 yards, creating distinct aiming points. Then, initiate your first shot group with the 300-meter sub-tension line as your point of aim.

Utilize the 300-meter sub-tension line to overlay the reticle at various distances, accounting for bullet drop. Follow the bullet's trajectory as it leaves the muzzle, rises in elevation to the maximum point at 100 meters, and subsequently descends out to 200 meters, precisely as predicted by our BDC reticle.

Fine-Tuning the Impacts

Trijicon ACOG Reticle styles basics

Following the initial shots, it's essential to adjust the impacts to align with your central point of aim. To enhance your chances of hitting the target, set up another target downrange at the second intersection point of your zero.

The greater accuracy you achieve at 300 meters, the more accurate your shots will be back at 25 meters. To calibrate your ACOG properly, utilize the 300-meter sub-tension line on a target situated at 300 yards to synchronize your point of aim and point of impact at this extended distance.

Adjust the Turrets

trijicon acog on scar rifle

When you make adjustments to your turret, you're essentially shifting your reticle internally. Typically, the turret provides guidance on the direction you want your shots to move.

Turn the turret as indicated to move your impacts to the right. Make turret adjustments as needed to align your impacts with the central point of aim.

If you notice that your reticle is moving in the opposite direction of the turret, it's because the turret's label refers to the point of impact, not the point of aim.

Read more about it here

Final Adjustments

Once you've made adjustments to the turret, fire another three-round group to assess the impact. If needed, make further adjustments until you attain the desired level of accuracy. It's crucial to personally test your setup because each rifle and optic combination is distinct.

Check out more Prism scopes like ACOG here