For handguns, red dots sights are one of the most sought-after optics an individual can use to modify their firearm. These sights are known to improve accuracy, allow faster target acquisitions, and enable quicker follow up shots. While red dots provide several key benefits, it is crucial to recognize that these attachments do have some drawbacks worth mentioning. To help you make an informed decision if red dots are the right optic for you, here is everything you need to consider before purchasing.
What You Need To Know About Red Dot Sights
Battery Powered
Many red dot sights operate using batteries, typically lasting 20,000 to 50,000+ hours. This lifespan depends heavily on brightness settings, motion-sensing auto-off features, and even the quality of the battery itself. While reflex optics are designed to be reliable, failures can occur, making regular maintenance essential. To ensure everything operates efficiently, many shooters choose to replace batteries every 6 to 12 months.
Fragile
Red dot sights are made with curved glass lenses that feature a spectral-selective mirror or beam-splitter coating that reflects a red LED light. While reflex optics are made to be durable and are often drop tested by manufacturers and third-party reviews, glass can shatter or crack under direct impact. To prevent damaging an optic, it is recommended to mount it properly, regularlycheck and tighten screws using a torque wench, and use rubber or hard plastics covers over the lens.
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Weight

Depending on optic and mounting type, many red dot sights can weigh under two ounces to around five ounces. While this bulk may seem insignificant, it can affect shooting performance. On lighter handguns, the increased mass can slow slide movement, especially when using lower powered ammunition. Added weight can also impact a firearm’s balance, making regular training necessary to familiarize yourself with your tool.
Concealment & Holster Limitation
While it is no secret that red dots look great on handguns, one drawback worth mentioning is the added height and bulk can create concealment challenges. Due to the increased height, the outline of your firearm can easily become visible, potentially resulting in unwanted attention or legal consequences. This means that choosing an appropriate carry position is essential. Strong side carry or appendix inside-the-waistband are two comfortable and effective carry positions that can help successfully conceal a handgun.
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A handgun modified with red dot sight also requires the right holster type. Standard holsters sight channel is typically designed to be low profile, making an optical-ready holster necessary. These holsters are designed with a cutout or groove that allows the optic to sit flush or protrude slightly, allowing for a smooth and snag-free draw.

Astigmatism
Astigmatism is a vision condition that occurs when the cornea is unevenly curved, causing distorted sight at all distances. As a result, reflex sights can appear blurry or smeared rather than a crisp LED dot. However, individuals with mild astigmatism may find they can use red dots without issue, especially when adjusting brightness or wearing prescription shooting glasses. If a red dot sight is not appropriate for you, holographic sights or optics with green dots are also effective options worth considering.
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Visibility
One drawback worth mentioning is reflex optics can become difficult to use in bright, sunny conditions, often appearing dim. To correct this issue, it is essential to adjust the brightness settings properly. In low-light environments or indoors, a lower setting is recommended while in bright conditions, a higher setting can help prevent the dot from becoming fuzzy. It is also important to understand that red dots can blend in with red or brown environments, which can make achieving a clear sight picture more challenging.
Wrapping It Up
Compared to iron sights, red dot optics are more susceptible to damage and can add weight to a firearm. These optics are known to improve accuracy, though they can cause concealment and holster limitations, requiring specific carry positions and the use of optic-ready gear. Red dot sights may also create visibility challenges for individuals with astigmatism or in certain environments, especially if brightness settings are not properly adjusted. However, despite these disadvantages, many people value red dot optics for their performance and appearance, making them an effective and practical option for modifying a handgun.