Swampfox Kingslayer Review

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Swampfox Kingslayer

Overall Score 8.5

Tested With Scoring System 2.0

Optical Quality
Durability and Build Quality
Weight and Size
Battery Life
Ease of Use

Learn How I Test & Score Here

⭐️ Verdict: Compact RMR Footprint Sight (8.5)

The Swampfox Kingslayer is quite a sight to behold. This micro reflex dot sight, with its 3 MOA red dot and an RMR footprint, is designed for precision and versatility. Weighing just an ounce and featuring a Ruby Red multi-coated lens, it’s built for both ease and efficiency. Its smart battery management and durability add to its impressive features.

When I put the Kingslayer through its paces, I was struck by how it handled different environments. Its robust build shrugged off accidental drops and adverse weather, while the sight remained clear, maintaining its zero impressively.


Extended Battery Life

Diverse Illumination Settings


Advanced Lens Coatings

Flexible Mounting

RMR Footprint


Auto Shut-Off Feature: Can be inconvenient if not remembered.

Price Comparison

Available at 2 shops 
Optics Planet

I can confidently speak to the capabilities and shortcomings of the Swampfox Kingslayer. 

Positioned against formidable competitors like the Trijicon RMR and the Vortex Venom, the Kingslayer aims to offer high-end features at a more accessible price point.

The headline promises of the Kingslayer revolve around its compact design, versatile reticle options, and advanced battery management, appealing to both seasoned shooters and newcomers. 

However, it’s not without its limitations; the auto shut-off feature, while battery-saving, can be inconvenient, and the limited reticle styles might not cater to all preferences. 

Performance Review of Swampfox Kingslayer

1. Optical Quality

Optical quality is a critical benchmark for any sight, and the Swampfox Kingslayer brings a commendable game. 

Its 1x22mm lens offers a clear, unobstructed view, essential for quick target acquisition. 

The multi-coated Ruby Red lens efficiently reduces glare and maximizes light transmission, a feature I found particularly effective during my field tests under varying light conditions.

However, it’s not without its quirks. While the anti-fog and hydrophobic coatings are effective, there are moments, especially in rapidly changing weather conditions, where these features seem less than perfect. 

This slight inconsistency can be a Problem for shooters who rely on unwavering optical clarity in all situations.

Comparing it to the market standards, the Kingslayer holds its own, especially considering its price point. 

While it may not reach the pinnacle of high-end models like the Trijicon RMR in terms of optical superiority, it certainly outperforms many others in its bracket. 

Its good optical performance benefits are evident in most shooting scenarios, offering a reliable sight picture that enhances shooting accuracy and confidence.

From a shooter’s perspective, while the Kingslayer’s optics are impressive, there’s a niggling feeling that with a bit more refinement, it could truly rival the top contenders. 

My personal experience aligns with a score that reflects its above-average performance, marred slightly by occasional lapses in its lens coatings’ effectiveness.

Score: 8/10

2. Durability and Build Quality

As a shooter who demands reliability, I hold the Kingslayer to high durability and build quality standards. 

The sight’s construction from aircraft-grade aluminum is impressive, providing a robust and shockproof frame that stands up to the rigors of regular use. 

During my field tests, I encountered several accidental drops and exposure to adverse weather conditions. 

Remarkably, it showed no sign of damage and maintained its zero, a testament to its resilience.

It stands shoulder-to-shoulder with other market leaders in terms of build quality. The added specialty lens coatings, like anti-fog, hydrophobic, and anti-scratch, further reinforce its durability. 

These coatings effectively prevent moisture build-up and surface damage, ensuring a clear view under various environmental conditions.

Score: 9/10

3. Weight and Size

The compact and lightweight design of the Swampfox Kingslayer is a significant plus in its favor. 

Weighing just 1 oz in pistol configuration, it is one of the lightest sights on the market. 

This minimal weight addition is crucial for shooters who prioritize maneuverability and ease of handling. 

In my experience, the Kingslayer’s lightweight nature did not compromise its robust feel, offering an excellent balance between durability and portability.

The benefits of its size and weight, such as ease of handling and minimal impact on the firearm’s balance, are significant.

It’s a case of personal preference, but for me, the Kingslayer’s diminutive size is more of a benefit than a hindrance.

Length1.8 inches
Width1.1 inches
Height1 inch
Weight1 oz (pistol config.)
Weight (with rifle/gun mount)1.3 oz

Score: 8.5/10

4. Battery Life

The battery life of the Swampfox Kingslayer is a significant feature that stands out. 

With the promise of up to 1,500 hours of use from a single CR1632 battery, it sets a high benchmark in the market. 

My experience aligns with this claim; the sight showed remarkable endurance over extended periods of use. 

The auto shut-off feature, while designed to preserve battery life, adds a layer of complexity; it requires remembering to reactivate the sight with the UP button, which can be slightly inconvenient in fast-paced situations.

Comparatively, the Kingslayer’s battery life outperforms many in its class, providing an edge, especially in prolonged shooting sessions or situations where battery replacement is not feasible. 

The advantage of such extended battery life is clear: less frequent replacements and reduced downtime, allowing for more focus on shooting rather than equipment maintenance.

My personal experience has been mostly positive, but the need for vigilance in monitoring battery life remains. 

Overall, the Kingslayer’s battery performance is impressive, but the auto shut-off feature requires a bit of a learning curve and awareness.

Score: 8.5/10

5. Reticle

The reticle on the Swampfox Kingslayer is commendable. The 3 MOA Red dot caters to various shooting preferences and scenarios. 

My testing revealed the 3 MOA dot to be exceptionally precise for long-range shooting, providing a clear and crisp target acquisition even at 100 yards. 

The reticle’s performance stands up well against the competition, offering a balance between precision and speed that matches or exceeds many alternatives in the market.

From my perspective, the Kingslayer’s reticle is well-executed and practical.

Score: 8/10

6. Ease of Use

The Swampfox Kingslayer excels in its ease of use, a crucial aspect for any shooter, whether experienced or novice.

Its installation is straightforward, thanks to the RMR footprint and pre-assembled Picatinny rail mount. 

The sight fits seamlessly on a variety of firearms, and during my testing, mounting and dismounting were hassle-free processes. 

The intuitive MOA adjustment dial is another feature that enhances its user-friendliness, allowing for quick and precise adjustments.

In comparison to other sights in the market, the Kingslayer is relatively more user-friendly, especially considering its advanced features. 

The benefits of its easy setup and use cannot be overstated; it makes the shooting experience more focused on the skill rather than equipment adjustments. 

Personally, while I appreciate the simplicity and efficiency of the Kingslayer, the auto shut-off feature requires a bit of a learning curve and mindfulness.

Score: 8/10

7. Price

In terms of pricing, the Swampfox Kingslayer positions itself competitively. It offers a range of high-end features without the premium price tag often associated with similar sights in the market, such as the RMR. 

During my testing, I found that the Kingslayer offers a performance level that exceeds its price point, making it an excellent choice for budget-conscious shooters who do not want to compromise on quality.

The Kingslayer provides a good balance between cost and performance. 

The benefits of investing in this sight are evident; you get a durable, reliable, and versatile sight without breaking the bank. 

Score: 9/10

Types of Guns Suitable for this Sight

Final Verdict

After thorough testing, the Swampfox Kingslayer impresses as a reliable red dot sight. Its strengths lie in its optical clarity, robust build quality, and extended battery life.

The sight’s compact and lightweight design makes it an excellent choice for various firearms, enhancing ease of handling without compromising durability. 

Overall, I rate the Swampfox Kingslayer highly for its performance, ease of use, and affordability, earning it a strong recommendation for both experienced shooters and newcomers alike.


Is the Swampfox Kingslayer always on?

No, the Kingslayer automatically shuts off after 4 hours of inactivity to conserve battery life.

Can Kingslayer’s Auto-Off be programmed?

No, the Auto-Off feature of the Kingslayer is not programmable.

What is the difference between Swampfox Kingslayer and Liberty?

The Swampfox Liberty differs from the Kingslayer with a narrower design, flush-fitting brightness buttons, a top-loading battery system, and compatibility with higher iron sights for co-witnessing.

Where is Swampfox Kingslayer made?

The Swampfox Kingslayer is manufactured in China.

Does the Kingslayer have a shake-awake feature?

No, the Kingslayer does not include a shake-awake feature.

What is the battery life of the Swampfox Kingslayer?

The Kingslayer boasts a battery life of up to 1,500 hours.

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