Best Scope For AR-15 – Scopes & Red Dots for AR-15 Reviews

The AR-15 has become the most popular semi-auto rifle configuration out today. With the ability of these firearms when it comes to all the different calibers, barrel lengths, add ons, and the ability to easily set up the rifle to best fit you, people have quickly began to purchase them.

With the mass amounts of AR-15’s on the market today, it has also caused there to be a large number of different kinds of scopes to flood the market as well.

My Picks for Ar-15 Scope

There is an endless amount of options when it comes to purchasing a scope for your AR-15 rifle. There are red dots, prism scopes, flip-over magnifiers, and magnified scopes.

Manufacturers are making scopes with caliber specific BDC reticles and caliber specific turrets for the AR-15 calibers on the market today. As well as scope packages with two sets of turrets that are caliber specific but the turrets can be changed for each caliber you may be using your AR-15 for.

With all the options on the market today it can become very confusing on which rifle scope is best for your needs. Keep in mind that every individual’s needs for scopes will vary and you will need a scope that fits what you are looking to do with your rifle.

Best Ar-15 Rifles

What To Look For In A Scope

When purchasing a scope for your new AR-15 rifle there are a lot of things to consider before purchasing.

The biggest thing to look at is what will the rifle be used for. Will you be doing long-range shooting primarily or will the scope be used for close-range CQB use?

If using the rifle for long range shooting only then a magnified scope will be best. You can have a rifle capable of shooting out to long distance but if you cannot see what you are shooting at it is going to be very difficult to hit it.

If your rifle is going to be used for CQB training and use, then a red dot or prism scope would be in your best interest. Red dots are mostly do not have any magnification but provide a clear dot for aiming at close ranges. You can always add a flip to the side magnifier to increase the distance you are able to use your red dot out too.

Prism scopes can have no magnification but there are several that have different set magnification power for using at longer distances. Prism scopes can be beneficial to anyone who as an astigmatism, if using a red dot with an astigmatism the dot will be blurry causing the red dot to not be as accurate for that user. Prism scopes eliminate the blurriness of the dot with an astigmatism.

Best Scope For AR-15

1. Vortex Optics Diamondback Tactical 4-16X44mm Riflescope

The Vortex Optics Diamondback tactical 4-16X44mm riflescope is a 30mm tube scope that is nitrogen purged. It is fog proof, waterproof, and shockproof. It is a first focal plane scope as well.

It has exposed turrets that come in either MOA or MRAD adjustments. Magnification is from 4 power to 16 power. The click adjustments are audible, crisp, and clear making adjustments easier. The turrets are not locking but do have zero reset so after sighting in the turrets can have the zero rest to your sighted in zero.

The diamondback tactical has parallax adjustment as well. The parallax is adjustable from 0 yards to infinity.

The lens is multi-coated with low dispersion glass for low light shooting. The glass is clear and allows for fine target acquisition.

The diamondback tactical has two different reticle options and the reticle is etched on the glass. The options for reticle choices are the EBR-2C(MOA) and the EBR-2C(MRAD).

The diamondback tactical scope also has a quick focus eyepiece that allows for fine tuning of the sight picture.

The diamondback tactical scope is ideal for long distance shooting.

2. Vortex Optics Viper PST II 3-15X44mm

The Vortex Optics Viper PST II 3-15mm scope is a 30mm tube scope that is shockproof, waterproof, and fog proof. The tube is nitrogen purged and is a first focal plane scope as well.

The turrets are exposed and come in either MOA or MRAD adjustments. The clicks are crisp and clear and are also audible. It has a parallax adjustment knob that is adjustable from 20 yards to infinity.

The Viper PST II has four different reticle options. The options are the EBR-2C(MOA), EBR-2C(MRAD), EBR-7C(MOA), and EBR-7C(MRAD). The reticle is etched on the glass. The turrets are also locking and zero resetting. As well as having illumination in 10 settings to assist in low light shooting situations.

The glass is clear and has XR fully multicoated lenses. The glass also has an Armortek coating that helps protect against scratches, oil, and dirt.

The Viper PST II is great for long distance and short-range shooting.

3. UTG 3-9X32 BugBuster Scope

The UTG BugBuster scope is a second focal plane scope that has a 1-inch tube, that is nitrogen purged, shockproof, fog-proof, and waterproof. It has emerald-coated lens with an etched mil-dot reticle. It also has red/green illumination.

The eye relief is accommodating, allowing for rapid target acquisition at all ranges.

The UTG Bugbuster scope has parallax adjustment from 3 yards to infinity.

The turrets are exposed and has ¼ MOA click adjustments. They are zero locking and resettable.

The UTG BugBuster comes with scope rings and a 2” sunshade as well. 

The UTG BugBuster is ideal for close to midrange shooting.

4. Monstrum 3-9X32mm Rifle Scope With Range Finding Reticle

The Monstrum 3-X32mm riflescope is a one 1” tube scope that is waterproof, shockproof, and fog proof.

The glass is clear but not as clear as the Vortex scopes listed earlier. The lens is multicoated to reduce scratching. The reticle is a range finding reticle with hash marks that are set up for a 100 yard zero, with increments up to 500 yards.

The Monstrum 3-9X32mm scope has an illuminated reticle that can be illuminated in either green or red

The turrets are covered and not exposed. The clicks are ¼” MOA adjustments for both elevation and windage. The clicks are spongy and not as crisp as other scopes but still work quite well.

The Monstrum 3-9X32mm scope comes with a detachable throw lever to assist with magnification adjustments. And comes with a standard set of scope rings as well.

The Monstrum 3-9X32mm is ideal for close to midrange shooting.

5. Bushnell Trophy TRS-25 Red Dot 

The Bushnell Trophy TRS-25 red dot is a red dot sight with a 3 MOA dot and 11 different brightness settings.

It is a nitrogen purged red dot that is fog proof, waterproof, and shockproof.

The dot is only able to be illuminated in red.

The TRS-25 is small, compact, and lightweight. That allows for rapid target acquisition and only a small amount of added weight to your rifle set up.

The TRS-25 is a “budget” red dot but is built well and very sturdy.

The TRS-25 is ideal for close range shooting, including CQB training or use. Though it is best for close range shooting it can be paired with a flip-over magnifier to allow for further range shots.

6. Leupold VX Freedom 1.5-4X20mm Riflescope

The Leupold VX Freedom 1.5-4X20 is a second focal plane scope with a 1-inch tube, that is nitrogen purged. It is waterproof, shockproof, and fog proof.

The glass is clear and crisp. The lens is scratch-resistant and has a duplex reticle. The lens also has Leupold’s twilight management system which allows for longer shooting times at low light levels.

The turrets are capped and have ¼ MOA click adjustments for windage and elevation. They are not locking or zero resetting turrets. The clicks are crisp and clear when adjusting.

The VX freedom comes with two reticle options, a standard duplex reticle or a pig-reticle.

The VX freedom is best for long to mid-range shooting. 

7. Monstrum P330-B Prism Scope

The Monstrum P330-B prism scope is a 30mm objective with 3X magnification. Unlike a red dot, the dot on the prism scope is visible even when not illuminated.

The reticle is a circle dot sight.

The turrets are covered and are ¼ click MOA adjustments.

The glass is clear and is multicoated to protect against scratches. The eye relief is 3.5 inches. With the eye relief being 3.5 inches, it allows for both eyes open shooting.  

The P330-B prism scope is ideal for anyone with an astigmatism and is best for close to mid-range shooting.

8. Sig Sauer Romeo5 1X20mm Compact 2 MOA Red Dot

The Sig Sauer Romeo5 1x20mm red dot is a 20mm objective red dot with a 2 MOA dot. It has 10 illumination settings, 8 for daytime use and 2 intended for nighttime shooting.

It is waterproof, fog-proof, and shockproof.

The glass is clear and multicoated with antireflection technology to decrease any interference with clarity of the dot in all light conditions.

The Romeo5 comes with both a low mount riser and a co-witness riser.

The Romeo5 has “MOTAC” technology, meaning that when the red dot senses motion it will automatically turn on and when it senses no motion it will turn itself off. This is a great addition to the red dot as it helps save battery life and makes it much easier to just engage your target without having to turn the power on.

The Romeo5 is ideal for close to mid-range shooting but can be paired with a flip to the side magnifier for making longer shots.

9. Nikon P-Tactical 2-7X32mm Matte BDC Scope

The Nikon P-Tactical 2-7X32mm matte BDC is a 1-inch tube scope with a BDC Supersub reticle designed for the AR-15 in .223 Remington, shooting a 55-grain bullet. The reticle has an open circle aiming point with additional hash marks for shots from 100 to 600 yards.

The glass is a nitrogen purged, multi-coated optic, that is shockproof, waterproof, and fog proof. The glass is crisp and clear.

The turrets are exposed with ¼ MOA clicks of windage and elevation adjustment. The turrets are spring loaded, locking and zero locking turrets. The zero can be easily returned to after making field adjustments for elevation and windage.

The magnification adjustment does not come with an attached throw lever. The magnification adjustment is stiff to begin with but does loosen up after use.

The P-Tactical scope is ideal for close to long range shooting.

10. Bushnell AR/223 1-4X24mm Riflescope

The Bushnell AR/223 1-4X24mm riflescope is a 30mm tube scope, that is nitrogen purged. It is waterproof, shockproof, and fog proof.

The glass is clear and is multicoated. The reticle is a .223 BDC reticle, that is designed to be sighted in at 100 yards with hash marks out to 500 yards, using .233 caliber bullets that are 55 to 62 grain bullets.

The AR/223 scope has a fast focus eyepiece but it does not have a parallax adjustment.

The turrets are exposed but are not locking or zero resetting. They are 0.1 mil adjustments for both windage and elevation.

The AR/223 riflescope is designed for close to mid range shooting.


As previously stated, there are a lot of options out there for a good AR-15 scope. There are many with added options and some that are just a basic scope.

Red dots and prism scopes are great for close to midrange shooting and rapid target acquisition. Magnified scopes are good for midrange to long range shooting.

When looking for a scope for your AR-15 always consider what your rifle will be used for. If you can try out a few scopes and find the best one for your needs and budget, then I highly recommend this route. If not look at reviews and make the best choice for you.

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1 thought on “Best Scope For AR-15 – Scopes & Red Dots for AR-15 Reviews”

  1. Just wondering…if any of these scopes would be “over-kill” for my Radical AR, that I only plan on using for 100 yard range plinking.


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