10 Best AR 15 scopes 2025 in the United States

The Trijicon ACOG 4 x 32 Scope is a versatile and robust choice for those needing a reliable AR-15 scope. It features a magnification range from 3x to 4x, which is suitable for mid-range shooting. The objective lens diameter of 40mm ensures clear and bright images. One of its standout features is the tritium/fiber optic illuminated reticle that adjusts brightness based on available light, making it advantageous for various lighting conditions without needing batteries. The red Chevron ranging reticle aids in bullet drop compensation up to 800 meters, enhancing long-range accuracy, particularly when paired with the USMC's M16A4 weapon system.

The eye relief is relatively short at 1.5 inches, which might be less comfortable for some users, especially with powerful recoil. The rugged aluminum-alloy housing makes it extremely durable, a notable feature for combat or harsh environments. The scope employs the Bindon Aiming Concept, allowing for 'both eyes open' shooting, which can improve situational awareness in close-quarter combat situations.

While it does not feature night vision, this scope is highly rated by users for its reliability and performance in diverse conditions. It is relatively heavy at 2 pounds, which might add noticeable weight to the rifle. The product is well-regarded but comes at a premium price, reflecting its advanced features and durable build, making it a suitable choice for serious shooters and professionals in demanding environments.

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 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.