Holosun Micro Red Dot Red Dot Black 2MOA Dot

Product Description

The Holosun HS403B is a micro red dot sight with a 2MOA dot reticle, designed for fast target acquisition on rifles, shotguns, and carbines at close to intermediate range.

A 2MOA dot covers about two inches at 100 yards, small enough for precision at typical defensive and competition distances without obscuring the target. This dot size works well for rapid transitions and situations where speed matters more than extreme precision.

The HS403B sits in the micro red dot category, making it a compact option for patrol rifles, home defense setups, and range use where you want repeatable zero without adding bulk or weight to the firearm.

Key Facts

• Model: Holosun HS403B
• Reticle: 2MOA red dot
• Finish: Red
• Type: Micro red dot sight

What the 2MOA Dot Means for Your Shooting

A 2MOA (minute of angle) dot is smaller than the more common 4MOA or 6MOA reticles. At 50 yards, a 2MOA dot covers approximately one inch of your target. This finer dot gives you better visibility on steel plates, bullseye targets, and precise shot placement when zeroed at typical defensive ranges.

Larger dots work well for very fast, up-close shooting. The 2MOA strikes a balance: fast enough for rapid engagement, precise enough for confirmation at distance. Many shooters prefer it on carbines and patrol rifles where both speed and accuracy count.

Micro Red Dot Mounting and Compatibility

Micro red dots typically mount to Picatinny or Weaver rail systems using a lower-third or absolute co-witness riser, depending on your firearm and sight picture preference. The HS403B is designed to fit standard micro footprints common across AR-15 flat-top receivers, AK rail systems, and tactical shotguns with optics rail.

If you’re adding this optic to a platform without a rail, you may need a rail segment or mount specific to your firearm. Send us a message to confirm mounting options and compatibility for your setup.

You’ll find a full selection of red dot sights and mounting accessories at Western Sport.

Ordering from Western Sport

Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: What firearms is the Holosun HS403B micro red dot compatible with?

A: The HS403B fits firearms with Picatinny or Weaver rail systems, including AR-15 rifles, AK variants with optic rails, tactical shotguns, and pistol-caliber carbines.

Q: How does a 2MOA dot compare to a 4MOA or 6MOA red dot?

A: A 2MOA dot is smaller and covers less of the target at distance, offering better precision for aimed fire beyond 25 yards. A 4MOA or 6MOA dot is faster to acquire up close but may obscure small targets at 50 yards and beyond. The 2MOA balances speed with precision.

Q: Can I use the Holosun HS403B for home defense and competition?

A: Yes, the HS403B works well for both. The 2MOA dot is precise enough for competitive accuracy stages and fast enough for close-range home defense scenarios. Micro red dots are lightweight and stay zeroed with proper mounting.

Q: What height mount do I need for the HS403B on an AR-15?

A: Mount height depends on whether you want absolute co-witness with your iron sights or lower-third co-witness. Absolute places the dot at the same height as your irons; lower-third sits higher for a heads-up shooting position. Send us a message to discuss your rifle setup and shooting style.

Q: How do I confirm the specifications for the HS403B before ordering?

A: Send us a message to confirm battery type, battery life, mounting footprint, warranty terms, or any other specification not listed here. The team can verify details and answer compatibility questions specific to your firearm.

Additional information