10 Best AR 15 scopes 2025 in the United States

The Trijicon 4x32mm ACOG Dual Illumination Green Crosshair Reticle is a robust option for AR-15 enthusiasts, particularly those seeking reliability and clarity in their optics. Its battery-free illumination system is a significant advantage, as it uses tritium and fiber optics to adapt to various lighting conditions automatically. This ensures you will have a clear sight picture in both bright daylight and low-light situations without worrying about battery failure. The 4x magnification is suitable for mid-range shooting, providing a good balance of visibility and ease of use.

One of the standout features is its rugged construction; the flat dark earth aluminum housing is forged from aircraft-grade materials, making it extremely durable and ideal for harsh conditions. The “both eyes open” design allows shooters to maintain situational awareness while aiming, adding a tactical advantage for close-quarters combat scenarios.

This scope has some drawbacks. The fixed 4x magnification may not be ideal for shooters who need versatility at varying distances. Additionally, the field of view at 7 degrees can feel narrow for some users, particularly when compared to scopes with adjustable magnification. Eye relief of 38.1 mm is decent but may not be sufficient for all shooters, especially those using heavy recoil rifles. The inclusion of the RMR Type 2 sight enhances its usability, providing an additional option for rapid target acquisition. While it comes with a premium price tag, the ACOG’s combat-proven history reflects its efficacy and reliability. This scope is particularly suited for serious shooters and tactical applications, but casual users or those seeking more adjustable options may want to consider other alternatives.

The ATN Thor 5 LRF is a high-tech thermal scope designed to enhance shooting performance in low visibility conditions such as night or fog. It features a 4-16x magnification range suitable for various distances, and a 320x240 sensor resolution paired with a bright OLED display provides clear, detailed images with rich colors, making target spotting easier in any light. The built-in laser rangefinder (LRF) allows quick distance measurement to targets, improving shooting accuracy.

A notable feature is the advanced ballistic calculator that automatically adjusts aiming points based on environmental data, helping shooters achieve more precise shots without manual calculations. Users can customize and share reticles, adding both functionality and personalization. The scope also records HD video of hunts for later review or sharing.

However, the scope weighs over 2 pounds and is larger than typical AR-15 scopes, which may affect balance and handling on lighter rifles. The price and technical complexity might exceed the needs of casual shooters, and export restrictions limit its availability. For serious users focused on thermal imaging and precision shooting with an AR-15, the Thor 5 LRF provides advanced capabilities, while newcomers or budget-conscious users might find it more than necessary.

The EOTECH EXPS3-0ODGRN is a holographic weapon sight designed to fit well on AR-15 rifles, especially for those looking for quick target acquisition and compatibility with night vision gear. Unlike traditional scopes with magnification, this sight offers a 68 MOA ring combined with a 1 MOA dot reticle, providing a clear aiming point without zooming in. This makes it great for close to mid-range shooting where speed and accuracy are key. The sight has a generous eye relief, so you don’t have to position your head perfectly to see the reticle clearly, which adds to comfort and faster aiming.

It mounts easily on common Weaver or Picatinny rails using a quick detach lever, saving time when switching between setups. The side button control is compact and doesn't take up much rail space, making it ideal if you want to add a magnifier later for longer shots. Its construction is sturdy aluminum, weighing just 11 ounces, so it won’t add much bulk to your rifle. Plus, it’s night vision compatible, which is a big bonus for low-light or tactical use.

Since it doesn’t have magnification, it’s not suited for long-range precision shooting. Also, while the reticle is excellent for fast target engagement, some users might prefer a traditional scope if zoom is important to them. The EOTECH EXPS3-0ODGRN is well-suited for hunters, competitive shooters, and tactical users who value quick, reliable aiming over magnification. Backed by a solid 10-year warranty, it’s a dependable choice if you want a high-quality holographic sight for your AR-15.