Bushnell RXM-300 Open Reflex Sight 1x28 4 MOA Red Shake Awake/Auto Off

The Bushnell RXM-300 open reflex sight is a competition-grade red dot built for shooters who demand speed, durability, and reliability across any firearm platform. Developed in collaboration with world-class competitor KC Eusebio, this 1x28 reflex sight delivers the large field of view and crisp 4 MOA dot you need for fast target acquisition and follow-up shots—whether you're running a pistol at a match, mounting it to an AR, or setting it on a shotgun. The massive 24×28 mm lens and optimized hood geometry combine to give you every advantage in daylight or low light, without the bulk of traditional scoped optics.

The RXM-300 is engineered to handle real-world use. Its aircraft-grade 7075-T6 aluminum housing and IPX7 waterproof rating mean it won't quit when conditions turn ugly. The exclusive EXO Barrier hydrophobic coating sheds rain, snow, and fog to keep your dot visible when the weather decides to test you. Shake-awake technology brings the sight to life when you need it, stretching battery life to over 35,000 hours on the mid-setting—that's more than four years of typical use on a single CR2032 battery.

The 4 MOA dot offers 12 brightness levels, with the two lowest settings compatible with night vision if your setup calls for it. Windage and elevation adjustments dial in 1 MOA per click, and the top-loading battery tray means zero fuss when it's time to swap power. The included Weaver low-profile mount and high-rise spacer give you the flexibility to install this sight on factory optics-ready pistols, AR-pattern rifles, or any RMR/SRO footprint platform. Bushnell backs the RXM-300 with a transferable 5-year warranty, because they built this thing to last.

Key Features

• Large 24×28 mm lens for unobstructed field of view and fast target acquisition
• Crystal-clear 4 MOA red dot with 12 brightness settings (2 NV-compatible)
• Shake-awake technology activates the sight on movement for extended battery life
• EXO Barrier hydrophobic coating resists fogging, water, and contaminants
• IPX7 waterproof rating—submersible to 1 meter for 30 minutes
• 35,000+ hour battery life on mid-setting (4+ years typical use)
• Aircraft-grade 7075-T6 aluminum construction for durability in the field
• 1 MOA per click windage and elevation adjustments
• Top-loading CR2032 battery for convenient replacement
• Includes Weaver low-profile mount, high-rise spacer, protective cover, and cleaning cloth
• Speed holes provide impact protection and rapid sight alignment reference
• Chamfered hood edges prevent snagging on gear and clothing
• Compatible with RMR/SRO footprint optics-ready pistols and AR-pattern rifles

Specifications

Frequently Asked Questions

What firearms can I mount the RXM-300 on?

The RXM-300 comes with a Weaver-pattern low-profile mount that works on any Weaver rail. It also includes a high-rise spacer for AR-pattern rifles. If your pistol is equipped with an RMR or SRO footprint mounting pattern—common on modern optics-ready designs—you can mount the RXM-300 directly without the Weaver base.

Is the RXM-300 good for competition shooting?

Yes. The RXM-300 was designed in collaboration with world-champion shooter KC Eusebio specifically for competitive pistol use. The large lens, crisp 4 MOA dot, fast target acquisition, and dependable electronics make it well-suited for match environments and high-stress scenarios.

How long does the battery last?

On the mid-setting (setting 8 of 12), the RXM-300 delivers over 35,000 hours of battery life—roughly four years of typical continuous use on a single CR2032 battery. The shake-awake feature can extend battery life further by allowing you to use lower brightness settings in normal conditions and rely on the auto-activation when you draw or move.

What's included in the box?

The RXM-300 ships with a Weaver-pattern low-profile mount, a high-rise spacer for AR/MSR platforms, a protective form-fit cover, basic adjustment tools, and a Spudz cleaning cloth.