Red Dot Sights, Reflex Sights & Holographic Optics 

Explore red dot sights, reflex sights, enclosed emitter optics, holographic sights and thermal red dot systems for compatible optics setups. This collection includes Holosun AEMS, ARO, HS-series and DRS optics, alongside EOTECH EXPS holographic sights for users comparing fast 1× aiming solutions, night-vision-compatible settings and magnifier-ready configurations.

Red dot and reflex optics are designed for fast sight acquisition with both eyes open, unlimited eye relief and a clear illuminated aiming point. Before choosing an optic, compare the reticle type, dot size, red or green illumination, open or enclosed emitter design, night vision settings, mounting footprint, co-witness height, battery life, waterproof rating and magnifier compatibility.

Choose the Right Red Dot Sight

Open Reflex Sights

Open reflex sights are lightweight and compact, making them useful when low profile, fast presentation and minimal optic weight are priorities. The Holosun HS507K X2 is an open reflex sight with a 2 MOA dot and 32 MOA circle reticle system, Shake Awake technology, up to 50,000 hours of battery life and a compact 1 oz housing.

Open reflex optics should be compared by footprint, lens size, reticle options, brightness settings, battery access, housing material and waterproof rating.

Enclosed Emitter Red Dot Sights

Enclosed emitter optics protect the LED emitter inside a sealed housing, helping improve reliability in dust, rain, mud and field conditions. Compare models such as the Holosun AEMS CORE, Holosun AEMS-EVO-RD, Holosun AEMS-EVO-GR and Holosun AEMS PRO X2 RD.

For enclosed optics, review the window size, reticle system, housing material, mount height, night vision brightness levels, battery type, solar backup, Shake Awake function and included lens covers or anti-reflective devices.

Holographic Sights

Holographic sights use a different reticle projection system than LED red dots and are often selected for their large viewing window, fast reticle acquisition and strong magnifier compatibility. The EOTECH HWS EXPS3 is night-vision compatible and includes additional brightness settings for Gen I through Gen III+ night vision devices.

The EOTECH HWS EXPS2 should be positioned separately from EXPS3 because EXPS2 and EXPS3 models differ in night vision compatibility. Product cards should make this distinction clear before purchase.

Thermal and Digital Reflex Sights

The Holosun DRS-TH combines a traditional red dot optic with a 256×192 thermal sensor, thermal fusion modes, internal video recording, a 1024×768 OLED digital screen and a 2 MOA dot with 65 MOA circle reticle. This product should remain in the optics collection but also be cross-linked from thermal imaging devices.

Red Dot, Reflex or Holographic Sight?

A red dot sight is a broad category for 1× illuminated aiming optics. Reflex sights are a common red dot format, often using an LED emitter reflected onto a lens. Holographic sights use holographic reticle technology and are typically compared separately because their reticle, battery use, viewing window and magnifier performance differ from LED red dots.

Users building a complete optics setup should compare magnifiers, scopes and mounts, laser aiming modules, tactical lights and IR illuminators and remote pressure switches.

Night Vision Compatibility

Not every red dot or holographic sight is suitable for use with night vision. Check whether the optic has dedicated low-output night vision brightness settings before pairing it with night vision goggles, night vision monoculars or night vision binoculars.

Important night vision comparison points include minimum brightness, reticle bloom, optical clarity through an image intensifier, mount height, passive aiming position and compatibility with magnifiers or thermal devices.

Reticles, Dot Size and Colour

Common reticle formats include a simple 2 MOA dot, larger circle-dot reticles, 65 MOA rings, 68 MOA holographic rings and multi-reticle systems. Smaller dots provide a finer aiming reference, while larger circles can be easier to find quickly.

Red reticles remain the most common option, while green reticles can appear brighter to some users in daylight. Green dots may also consume more power depending on the optic model, so compare battery life and brightness settings by product rather than by colour alone.

Mounting, Co-Witness and Magnifier Compatibility

Confirm the mount type before ordering. Rifle-style optics may use Picatinny / MIL-STD-1913 mounts, lower 1/3 co-witness mounts, absolute co-witness mounts or brand-specific footprints. Pistol-style reflex sights may use compact footprints that are not interchangeable without an adapter plate.

For magnifier setups, confirm optic height, mount height and eye relief. Holographic sights such as EOTECH EXPS models and many Holosun AEMS / HS optics can be paired with compatible flip-to-side magnifiers where the optical height matches.

Red Dot Sight Compatibility Checklist

Before selecting an optic, confirm:

• Optic type: open reflex, enclosed red dot, holographic or thermal reflex
• Reticle: dot, circle-dot, multi-reticle or holographic ring
• Dot size in MOA
• Reticle colour: red or green
• Night vision brightness settings
• Mounting footprint or rail interface
• Co-witness height
• Magnifier compatibility
• Battery type and runtime
• Solar backup or motion activation
• Waterproof rating and vibration rating
• Included mounts, lens covers and tools

For night-vision-focused setups, browse NVG mounting components, battery packs, night vision accessories and our helmet-mounted night vision setup guide.