Red Dot Sights
Red dot sights improve accuracy and provide faster target acquisition by eliminating the need to line up crosshairs or align front and rear sights. They are lightweight, durable, and allow the shooter to keep both eyes open, vastly increasing the field-of-view.
Although the term “Red Dot Sight” is ubiquitous according to https://adventurefootstep.com/, many red dot sights actually sport green dots. With so many red-dot sights available, the biggest challenge facing any AR-15 shooter is deciding which one is most appropriate.
Popular Red Dot Sights (in alphabetical order):
Burris Fastfire III
The Fastfire’s automatic brightness mode takes the guesswork out of its three levels of illumination, with windage and elevation adjustable by hand. Another advantage is fast, parallax-free target acquisition. A Picatinny rail mount is included.
Bushnell Trophy TRS-25
Compact, waterproof, fog-proof and recoil proof, the Bushnell Trophy TRS-25 Red Dot Sight Riflescope is 2.4 inches long and weighs 3.6 ounces. With Bushnell’s Amber-Bright technology, vision is improved by the amber coating of the front lens.
Holosun HS503C Paralow
If you are looking for a red-dot sight offering basic simplicity, reliability, and durability, take a look at the Holosun HS503C Paralow
Measuring 5.24 inches long, and weighing in at 4.25 ounces, the Partlow offers a lot in a small, easy to use package, and can be mounted on either Picatinny or Weaver-style rails.
Sig Sauer Romeo5
The Sig Sauer SOR52001 Romeo5 is another red dot sight offering reliability and durability in a small (2.47 inches and 5.1 ounces) package.
Features include Motion Activated Illumination (MOTAC), a Sig Sauer concept. The optic turns on when it senses movement, then turns off after the movement stops.
In addition to eight regular optical settings, the Sig Romeo adds two-night settings.
The Trijicon Miniature Rifle Optic (MRO) offers a 2.0 MOA Adjustable Red Dot Reticle.
The MRO-C-2200004 1x25mm MRO riflescope is the result of Trijicon’s 20+ years’ in the design and manufacture of military optics. Its rugged, aluminum housing, and fully-sealed construction stands up well to violent use. Its multi-coated lenses offer superior clarity, and it is rated as waterproof up to 30 meters (100 feet).
UTG’S Instant Target Aiming (ITA) red/green dot reticle is waterproof, fog-proof, and shockproof. Its high-tech emerald coating also makes it scratch-proof. At 4.2 inches long and 9.8 ounces, it offers a durable, reliable, highly functional optical accessory and separates from the Picatinny rail by flipping a lever. Its extra-bright, T-style reticle is intended for basic, no-nonsense shooting
Vortex Optics Strikefire II
In addition to outstanding durability and reliability, the Vortex Optics Strikefire II, with its ten brightness levels, offers exceptional ease of operation. Its aircraft-grade, aluminum alloy construction offers a compact package at 5.6 inches long and 7.2 ounces and installs in minutes. The optic allows the shooter to switch from red to green and is adjustable by hand in one-half MOA clicks.
Of course, this list is not the end of all things. There are many red dots out there that are awesome. You can even find a lot of them reviewed on youtube, e.g.