10 Best AR 15 scopes 2025 in the United States

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 Vortex Crossfire II 3-9x40 is a solid choice for an AR-15 scope, especially for those interested in hunting or general shooting. Its 3 to 9 times magnification offers a flexible zoom range suitable for medium-distance targets, while the 40mm objective lens strikes a nice balance between brightness and compactness. The V-Brite illuminated V-Plex reticle helps with quick target acquisition in low-light situations, thanks to a battery-powered brightening dot without overwhelming complexity. The scope provides generous eye relief and a forgiving eye box, making it easier to get a clear sight picture quickly, which is important for fast-paced shooting. The fast focus eyepiece is handy for sharpening the reticle with minimal effort.

The scope’s fully multi-coated lenses enhance light transmission, giving bright and clear images, which is valuable during dawn or dusk shooting. Constructed from durable aircraft-grade aluminum and sealed against water and fog, it’s built tough to handle rough conditions and recoil without losing zero. While it doesn’t feature night vision compatibility or advanced turret adjustments found on higher-end models, its simple and reliable turrets provide straightforward windage and elevation adjustments, good enough for most AR-15 shooters. Its lightweight design (15 ounces) makes it comfortable to carry for extended periods.

The lifetime VIP warranty adds peace of mind for long-term ownership. This scope suits shooters who want dependable performance with good magnification versatility and rugged build without extra bells and whistles. It is a user-friendly option that balances clarity, durability, and ease of use well for typical AR-15 applications.

The Vortex Optics Crossfire II 4-12x50 AO is a solid choice for AR-15 users who want a versatile scope suitable for hunting and target shooting at various distances. Its 4-12x magnification range offers flexibility, allowing you to zoom in for precision or keep a wider view when needed. The large 50mm objective lens helps gather ample light, which means brighter and clearer images, especially in low-light conditions like dawn or dusk. The Dead-Hold BDC reticle is designed to simplify aiming by providing built-in holdover points, so you don’t have to guess your bullet drop at different ranges, which is especially helpful if you’re hunting or shooting at varying distances. Eye relief is generous and the scope has an ultra-forgiving eye box, making it easier to quickly find your sight picture without worrying much about exact head positioning.

The adjustable objective helps eliminate parallax error, improving accuracy when you focus on your target. The turrets are finger-adjustable with MOA clicks and can be reset to zero, which is convenient for making precise adjustments in the field without tools. The scope is made from aircraft-grade aluminum, ensuring it’s tough and shockproof, plus it is waterproof and fogproof, so it can handle rough weather conditions. On the downside, this model does not support night vision, which could be a limitation if you plan on shooting in very low light or nighttime conditions. Also, while the scope is fairly lightweight, it weighs about 2 pounds, which might add some heft to your rifle setup.

If you want a reliable, easy-to-use scope with good optical clarity and durable build for general hunting and shooting on an AR-15, the Vortex Crossfire II 4-12x50 AO is a very dependable option backed by a strong lifetime warranty.