How To Choose A Scope For An AR-10

Best Scopes for AR-10

Hunting is fun, especially for those who love being on edge. However, until your state does not permit it, you will need a scope for your long run. If you have an AR-10, you will realize that you have a wide variety of choices to make.

Instead of feeling confused, we come with a solution. Here are some aspects you must keep in mind while choosing a scope for your AR-10. Also, read on from some FAQ’s that may strike your mind.

Main Tube And Objective Lens

The diameter of a riflescope’s main tube is around 1”, 30 mm or 34 mm. Choosing large diameter tubes means that your range of adjustments will increase too. This is good for durability as well as long-distance target hitting.

However, upon choosing a scope with a wider diameter, the material used will increase the weight. Also, the rings that are used to mount them can become expensive and less common to find. To be truthful, most rifles only need a high quality 1” riflescope.

In case you are looking for Best Scopes for AR-10, you may continue with a 1” one. But for increased adjustment and other benefits, you can buy a “happy median,” which is an optic with a 30 mm main tube. You should also choose a Nitrogen or argon purged optic to displace water vapor reduce fogging internally. A waterproof and shockproof scope is another requirement you must keep in mind.

There are multiple options when it comes to the Objective lens. Size can vary from 20 mm to 72 mm. Mostly the people choose anywhere between 40 to 50 mm lens. By increasing the lens size, your ability to see clearly in low light conditions improves. But, if you select a scope above 50 mm, you would have to place the optic higher than usual.

This means that your scope to eye alignment can be impacted, reducing the accuracy of the target hit. Plus, scopes that have a higher objective lens would be cumbersome to carry around. It is better to stick with a 40-44 mm size scope for your benefit.


The principle with Glass is straightforward. If you buy a cheap glass, the effect you get would be inferior as well. Preference should be given to purchasing an optic with extra-low dispersion glass. Doing that reduces chromatic aberration, in turn, increasing sharpness, contrast, and the color fidelity. Also, for maximum brightness, choose a multi-coated lens.

Reticle and Focal plane

The choice of the reticle will be dependent on your gun, quarry, and location. Usually, a standard duplex is optimal for any kind of firearm. However, if you are going to shoot in thickets, it is best to opt for German No 4 or Heavy

Duplex reticle.

About the focal plane, the choice is clear. If the reticle is in the first focal plane, the scale with proportion to the image is not going to change. It leads to accurate ranging, holdovers, and windage corrections, thus making a preference for most marksmen.

In case the reticle is in the second focal plane, the reticle would remain the same sized while the image changes as per the magnification. The sub-tension changes frequently, so for accuracy, a specific magnifying setting is required. You will find the second focal plane in cheap scopes.

Turrets and Adjustments

Rapid adjusting tactical style turrets are in demand. However, while choosing ensure that they are consistent and have a return to zero feature. Moreover, you will have to check the turrets before firing the shot to see that the turret has not rotated accidentally.

If it has rotated and you did not notice, it could lead to a miss or a wrong hit. Tactical scopes will have 0.1 mil clicks, whereas non-tactical models have adjustments made in inches. It takes dedication to learn the mil-dot system, and if you want to avoid it choose standard turrets with ¼” clicks.


Proper magnification is a topic of debate, but people usually prefer an increase of 3X every 100 yards. This 3:1 zoom ratio led to the 3-9X scope being considered the all-rounder scope. However, now you have scopes in different ratios like 5:1, 6:1, etc. This means a single scope can handle any kind of target hitting quickly.

If you are going to shoot within 200 yards, don’t miss the dot and reflect style sights. Their magnification may be an issue, but they are worthwhile for small ranges. However, beware of cheap copies of popular models as they might just ruin the game for you


Best Scopes for AR-10

1. Which mount to choose for an Ar-10 scope?

Ar-10 is not very flexible when you talk about mounting options with compatible scopes. It is compatible with a one-piece mount making it a reliable choice. You could also use it with the second one two-piece rings, which are great at their job.

Most users prefer the first piece as it provides excellent stability and come pre-aligned with the gun. On the other hand, the two-piece rings are lighter and can be easily changed. Though when it comes to facing heavy recoil, they are unable to provide rigidity.

2. Which is the best Night force scope that we should buy for Ar-10?

When you are talking about mounting a Nightforce scope with an Ar-10 rifle, you may choose any random model. As per opinions Nightforce NXS, 2.5-10X compact riflescope blends well with the gun. It provides coverage close to 700 yards and is quite durable. Plus, it comes with a superior functionality reticle that increases the accuracy of your shot.

3. How to learn mounting a scope on an ar-10?

Here are some steps to follow when mounting your scope on an c;

  • First, place the rifle on a bench or rubber mat, so it does not slip while mounting the scope.
  • Next, you will have to level the rifle.
  • Now attach the one-piece or two-piece mount on the rail and level both of them. After your attachment is done, put the level on the flat surface so that it remains perpendicular and parallel to your rifle.
  • Couple the scope to the ring, and when you are doing so, take care to maintain the gap between lens and rail. You will also have to see the gap between the lens and the barrel.
  • You should now place the level on the flat part of the scope and see it is correctly leveled in parallel as well as perpendicular way.
  • Start your work by putting the ring on the mounting bracket but don’t disturb the position of the scope. Now tighten the screw on the mount so that the alignment is not affected. Apply gels on screw mounts so they can move comfortably. Make sure the screw is not very tight, as this could lead to the thread being damaged.
  • Lastly, check with your level and see everything is correctly aligned to start using the scope.
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