The M16a2 is a classic rifle, celebrated for its reliability and versatility. To enhance its performance, especially in terms of target acquisition, a red dot sight is a fantastic addition.

In this article, I'll walk you through the best red dot sights for the M16a2, detailing their specifications, best features, pros, cons, and my personal experiences with each.

Additionally, I'll include online customer comments and discussions to give you a well-rounded view of each product.

By the end of this guide, you'll have a clear understanding of how to choose the best red dot sight for your M16a2 and answers to frequently asked questions.

Top 5 Best Red Dot Sights for M16a2 in 2024

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Aimpoint PRO⁠

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Trijicon MRO⁠

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EOTECH EXPS3⁠

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Sig Sauer Romeo5⁠

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HOLOSUN 503CU⁠

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1. Aimpoint PRO (Patrol Rifle Optic)

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Specifications:

Reticle: 2 MOA Red Dot

Battery Life: 30,000 hours (3 years) on setting 7

Weight: 11.6 oz

Waterproof: Up to 150 feet

Adjustment: 1/2 MOA per click

Best Features:

Night vision compatibility

Durable construction with hard-anodized aluminum

Flip-up lens covers included

QRP2 mount with a torque-limiting twist knob

Pros:

Extremely long battery life

Robust and reliable

Clear and precise red dot

Cons:

Slightly heavier compared to other red dots

Higher price point

Experience: I've used the Aimpoint PRO extensively on my M16a2, and its reliability is unmatched. The clarity of the red dot, combined with the robust construction, makes it ideal for both tactical and recreational use. The night vision compatibility is a significant bonus for low-light conditions.

Customer Comments: Many users praise the Aimpoint PRO for its durability and long battery life. A common sentiment is that this sight is worth every penny for its performance and reliability.

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2. Trijicon MRO (Miniature Rifle Optic)

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Specifications:

Reticle: 2 MOA Red Dot

Battery Life: 5 years on setting 5

Weight: 4.1 oz

Waterproof: Up to 100 feet

Adjustment: 1/2 MOA per click

Best Features:

Large aperture and tapered light path

Multi-coated lenses

Ambidextrous brightness controls

Compact and lightweight

Pros:

Excellent field of view

Lightweight and compact design

Long battery life

Cons:

The brightness knob can be stiff

Slightly more expensive

Experience: The Trijicon MRO is one of my favorite red dots for the M16a2 due to its compact size and superior optics. The sight picture is incredibly clear, and the large aperture provides an excellent field of view, making target acquisition quick and easy.

Customer Comments: Users frequently highlight the Trijicon MRO’s clarity and field of view. However, some have noted that the brightness knob can be a bit stiff initially but tends to loosen up with use.

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3. EOTech EXPS3

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Specifications:

Reticle: 68 MOA ring with 1 MOA dot

Battery Life: 600 hours at nominal setting 12

Weight: 11.2 oz

Waterproof: Up to 33 feet

Adjustment: 1/2 MOA per click

Best Features:

Holographic sight with multiple reticle options

Side button operation for easy access

Quick-detach lever

Night vision compatible

Pros:

Fast target acquisition with the holographic reticle

Durable and reliable

Easy to mount and dismount

Cons:

Shorter battery life compared to other red dots

Heavier than some competitors

Experience: The EOTech EXPS3 stands out with its unique holographic reticle, which aids in rapid target acquisition. Its side button operation makes adjustments simple, even while wearing gloves. The quick-detach lever is a convenient feature for field adjustments.

Customer Comments: Many users appreciate the EOTech EXPS3 for its speed in target acquisition and durability. The primary complaint is the battery life, which, while adequate, is shorter than some other red dot options.

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4. Sig Sauer Romeo5

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Specifications:

Reticle: 2 MOA Red Dot

Battery Life: 50,000 hours

Weight: 5.1 oz

Waterproof: IPX-7 rated

Adjustment: 1 MOA per click

Best Features:

MOTAC (Motion Activated Illumination)

Comes with low mount riser and co-witness 1.41” riser mount

10 illumination settings (8 daylight + 2 NV)

Pros:

Excellent battery life

Affordable

Motion activation conserves battery

Cons:

Limited brightness settings for night vision

Slight parallax at extreme angles

Experience: The Sig Sauer Romeo5 is an excellent budget-friendly option that doesn’t skimp on features. The MOTAC feature is particularly impressive, turning the optic on with movement and off when idle, conserving battery life. Its lightweight design is a perfect match for the M16a2.

Customer Comments: Users often mention the Sig Sauer Romeo5 as a great value for money. Its battery life and motion activation feature are particularly praised. Some users have noted the slight parallax issue but find it manageable.

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5. Holosun HS503CU

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Specifications:

Reticle: 2 MOA dot and 65 MOA circle

Battery Life: 50,000 hours

Weight: 6.3 oz

Waterproof: IP67 rated

Adjustment: 1/2 MOA per click

Best Features:

Solar Failsafe technology

Multiple reticle options

Shake Awake technology

12 brightness settings (10 DL & 2 NV)

Pros:

Dual power options (solar and battery)

Multiple reticle choices

Long battery life

Cons:

Slightly bulkier design

Limited to two night vision settings

Experience: The Holosun HS503CU combines innovative technology with reliability. The solar failsafe feature ensures the sight remains operational even if the battery fails, and the multiple reticle options provide versatility. It’s a robust choice for the M16a2.

Customer Comments: Customers frequently mention the Holosun HS503CU’s durability and the convenience of the solar backup. The reticle options are also a popular feature. However, some users find the sight slightly bulkier than expected.

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How to Choose the Best Red Dot Sight for M16a2

Choosing the right red dot sight for your M16a2 involves several factors:

Reticle Size and Type: The reticle size (MOA) affects precision and speed. Smaller dots (1-2 MOA) are more precise but may be harder to see quickly, while larger dots (3-4 MOA) are faster to acquire but less precise.

Battery Life: Consider how long the sight will last on a single battery. Some models offer up to 50,000 hours of battery life.

Durability: Ensure the sight is robust and can withstand harsh conditions. Look for features like waterproofing and shock resistance.

Mounting Options: Make sure the sight can be easily mounted on your M16a2 and that it comes with necessary mounts or adapters.

Price: Balance your budget with the features you need. While high-end models offer more features, there are also budget-friendly options that perform exceptionally well.

User Reviews: Check online reviews and forums to see other users' experiences with the red dot sight.

FAQs

Q1: What is the best MOA size for a red dot sight on an M16a2? A: For most users, a 2 MOA dot is a good balance between precision and speed. It provides enough accuracy for long-range shots while being easy to see quickly.

Q2: Can I use a red dot sight with night vision? A: Yes, many red dot sights, such as the Aimpoint PRO and EOTech EXPS3, offer night vision compatibility.

Q3: How do I mount a red dot sight on my M16a2? A: Most red dot sights come with mounting options compatible with Picatinny rails, which are standard on the M16a2. Follow the manufacturer's instructions for installation.

Q4: How long do the batteries last in red dot sights? A: Battery life varies by model. Some, like the Sig Sauer Romeo5, can last up to 50,000 hours, while others may last a few hundred hours.

Q5: Are red dot sights waterproof? A: Many high-quality red dot sights are waterproof to varying degrees. Check the specifications of each model for detailed information.

In conclusion, choosing the best red dot sight for your M16a2 depends on your specific needs and preferences. The Aimpoint PRO, Trijicon MRO, EOTech EXPS3, Sig Sauer Romeo5, and Holosun HS503CU are all excellent choices, each with its unique features and advantages. Consider factors such as reticle size, battery life, durability, mounting options, and price to make an informed decision.

Top 5 Best Red Dot Sights for M16a2 in 2024

1. Aimpoint PRO (Patrol Rifle Optic)

2. Trijicon MRO (Miniature Rifle Optic)

3. EOTech EXPS3

4. Sig Sauer Romeo5

5. Holosun HS503CU

How to Choose the Best Red Dot Sight for M16a2

FAQs

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