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 Leupold VX-5HD 3-15x44 CDS-ZL2 is a high-quality riflescope well suited for AR-15 owners who want versatility from close to longer-range shooting. Its magnification range of 3 to 15x allows for flexibility, making it good for both quick target acquisition and more precise shots. The 44mm objective lens, combined with Leupold’s high-definition lenses and Guard-ion coating, offers clear and bright images even in challenging weather, which is helpful for hunting or outdoor use.

The Impact-29 MOA reticle is placed in the second focal plane, meaning the reticle stays the same size as you zoom, which some shooters prefer for clarity but may require adjustments when estimating range at different magnifications. Eye relief is generous and the side focus parallax adjustment makes it easier to keep your target sharp from various shooting positions. A standout feature here is the CDS-ZL2 turret system, which provides two full revolutions of elevation adjustment and includes a push-button ZeroLock to prevent accidental changes. This customization, combined with Leupold’s option for laser-marked bullet-drop dials tailored to your specific ballistics, is great for serious shooters who want precision without fuss.

The scope is built tough with waterproof, fogproof, and shockproof construction, and backed by Leupold’s lifetime warranty, ensuring it can handle rough conditions and last for years. It weighs about 2 pounds, which might be a bit heavy for those looking for a lightweight option on their AR-15. Also, being a second focal plane scope, the reticle’s use at varying magnifications might not suit everyone. This scope is ideal for AR-15 users who value clear optics, ruggedness, and customizable elevation settings, especially for hunting or tactical use, but those wanting a lighter or first focal plane scope might consider other options.

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.