Holosun 407K vs 507K: What’s the Difference?
If you are comparing the Holosun 407K vs 507K, the short answer is simple: the 407K is the dot-only model, while the 507K gives you Holosun’s Multi-Reticle System. Both are compact K-footprint pistol optics built for concealed carry and slimline handguns, but the reticle system is what separates them.
Choose the Holosun 407K if you want a simple 6 MOA dot. Choose the Holosun 507K if you want the option to switch between a 2 MOA dot, 32 MOA circle, or circle-dot reticle.
TLDR: Holosun 407K vs 507K
The main difference between the Holosun 407K and Holosun 507K is the reticle. The 407K uses a simple 6 MOA dot, while the 507K uses Holosun’s Multi-Reticle System with a 2 MOA dot, 32 MOA circle, or circle-dot combination. Other than the reticle system, the two optics are very similar in size, footprint, battery setup, and durability.
- Choose the Holosun 407K if you want a simple, fast, dot-only carry optic.
- Choose the Holosun 507K if you want multiple reticle options in the same compact K-footprint size.
Quick Navigation
- 407K vs 507K Models
- 407K vs 507K Footprint
- Size and Intended Use
- Deck Height and Iron Sights
- Reticle Difference
- Battery Life
- Similarities
- Differences
- Red Dot vs Green Dot
- Which One Should You Choose?
Holosun 407K vs 507K Models
The 407K and 507K are both available in compact X2 models for carry pistols. The 407K lineup is built around a 6 MOA dot, while the 507K lineup adds Holosun’s Multi-Reticle System.
Holosun 407K X2 Options
- Holosun 407K X2 Red Dot Sight, 6 MOA Dot
- Holosun 407K X2 Green Dot Sight, 6 MOA Dot
- Holosun 407K X2 Gold Dot Sight, 6 MOA Dot
Browse all available models here: Holosun 407K Sights.
Holosun 507K X2 Options
- Holosun 507K X2 Red Dot Sight, 2 MOA Dot & 32 MOA Circle
- Holosun 507K X2 Green Dot Sight, 2 MOA Dot & 32 MOA Circle
Browse all available models here: Holosun 507K Sights.
Holosun 407K vs 507K Footprint
The Holosun 407K and Holosun 507K both use the Holosun K footprint. That means the footprint itself is not the deciding factor between these two optics. If your pistol is cut for a K-footprint optic, both models are in the same general fitment category.
The important step is confirming your exact slide cut, adapter plate, and mounting screws before ordering. Some pistols use a true K-footprint cut, while others use an RMSc-style cut that may require a plate or slight fitment differences depending on the firearm.
If your pistol takes a larger RMR-footprint optic, look at models like the Holosun 507C instead. If your pistol takes a compact K-footprint optic, the 407K and 507K are the two models most shoppers compare.
Holosun 407K vs 507K Size and Intended Use
The 407K and 507K are the same size. Both have a 0.58″ × 0.77″ window, 1.6″ × 0.98″ × 0.95″ body dimensions, and a 1 oz body weight.
That makes both optics a strong fit for concealed carry, slimline pistols, and compact handgun setups where a larger optic would add unnecessary bulk. Since the body size is the same, your choice should come down to reticle preference, not size.
| Spec | Holosun 407K | Holosun 507K |
|---|---|---|
| Footprint | Holosun K footprint | Holosun K footprint |
| Window size | 0.58″ × 0.77″ | 0.58″ × 0.77″ |
| Body dimensions | 1.6″ × 0.98″ × 0.95″ | 1.6″ × 0.98″ × 0.95″ |
| Weight | 1 oz | 1 oz |
| Best use | Simple concealed carry setup | Concealed carry with reticle flexibility |
407K vs 507K Deck Height and Iron Sights
Because the 407K and 507K share the same body dimensions, they sit very similarly on the slide. One does not give you a meaningfully lower or higher optic body than the other.
If you are trying to co-witness with iron sights, the optic model is only one part of the equation. Your slide cut depth, plate thickness, and sight height will usually matter more than choosing between the 407K and 507K.
Holosun 407K vs 507K Reticle Difference
The reticle is the biggest difference between the two optics.
| Feature | Holosun 407K | Holosun 507K |
|---|---|---|
| Reticle | 6 MOA dot | 2 MOA dot, 32 MOA circle, or circle-dot |
| Selectable reticle | No | Yes |
| Best for | Simple and fast sight picture | More reticle flexibility |
| Main advantage | Easy dot pickup with no extra reticle options | Switch between precision and speed-focused reticles |
The 407K gives you a 6 MOA dot. That larger dot is easy to find quickly and keeps the sight picture simple. For a dedicated concealed carry pistol, that simplicity can be a benefit.
The 507K gives you a 2 MOA dot, a 32 MOA circle, or the circle-dot combination. The 2 MOA dot gives you a finer aiming point, the 32 MOA circle is faster to pick up at close range, and the circle-dot option gives you both at the same time.
407K vs 507K Battery Life
Both optics use a CR1632 battery with a side-loading battery tray. The side tray is useful because you can replace the battery without removing the optic from the slide.
Both models are rated up to 50,000 hours of battery life, but real-world runtime depends on brightness setting, reticle selection, and use. On the 507K, using the full circle-dot reticle can use more power than running the dot-only mode.
| Battery spec | 407K and 507K |
|---|---|
| Battery type | CR1632 |
| Battery location | Side tray |
| Battery life | Up to 50,000 hours |
| Brightness settings | 10 daylight / 2 night vision |
| Shake Awake | Yes |
| Solar | No |
Holosun 407K and 507K Similarities
The 407K and 507K are more alike than different. They share the same footprint, size, weight, battery type, battery location, housing material, adjustment value, water resistance, and vibration rating.
| Spec | 407K and 507K |
|---|---|
| Footprint | Holosun K footprint |
| Window size | 0.58″ × 0.77″ |
| Body dimensions | 1.6″ × 0.98″ × 0.95″ |
| Weight | 1 oz |
| Battery | CR1632 |
| Battery location | Side tray |
| Battery life | Up to 50,000 hours |
| Brightness settings | 10 daylight / 2 night vision |
| Housing material | 7075-T6 aluminum |
| Adjustment | 1 MOA per click |
| Windage/elevation travel | ±30 MOA |
| Water resistance | IP67 |
| Vibration rating | 5000G |
| Magnification | 1x |
| Operating temperature | -30°C to 60°C |
Holosun 407K and 507K Differences
The practical difference is the reticle system. The 407K is the simpler option. The 507K is the more flexible option.
| Difference | Holosun 407K | Holosun 507K |
|---|---|---|
| Reticle system | Dot-only | Multi-Reticle System |
| Reticle | 6 MOA dot | 2 MOA dot, 32 MOA circle, or circle-dot |
| Reticle flexibility | Lower | Higher |
| Typical buyer | Wants simple and fast | Wants selectable reticles |
| Value angle | Usually the better value if you only want a dot | Usually worth it if you want MRS |
Red Dot vs Green Dot Versions
Both optics are available in red and green dot variants. Red is the traditional choice and works well for most shooters. Green can appear brighter or easier to pick up for some eyes, especially in daylight or against certain backgrounds.
If you have astigmatism, the best choice is personal. Astigmatism can make illuminated dots look blurry, starburst-shaped, or distorted, and some shooters find that red, green, dot size, brightness level, or reticle shape changes what they see. A green dot variant is worth considering if your eyes struggle with red, but it is not a guaranteed fix.
For the simplest setup, compare the 407K red dot, 407K green dot, or 407K gold dot. For MRS reticle flexibility, compare the 507K red dot or 507K green dot.
Is the Holosun 507K Worth It Over the 407K?
The 507K is worth it if you want the Multi-Reticle System. If you plan to use the circle-dot reticle, want the option to switch between reticles, or are not sure which reticle you prefer yet, the 507K gives you more room to experiment.
The 407K makes more sense if you already know you want a simple 6 MOA dot. If you do not care about the 32 MOA circle or circle-dot option, the 407K gives you the same compact footprint and body size with a simpler reticle setup.
Which Is Better: Holosun 407K or 507K?
The Holosun 407K is better for shooters who want a simple, fast, dot-only optic for concealed carry. The 6 MOA dot is easy to find and keeps the sight picture clean.
The Holosun 507K is better for shooters who want more reticle flexibility. The 2 MOA dot, 32 MOA circle, and circle-dot combination make it more versatile for carry, range use, and shooters who like to tune the sight picture to their preference.
There is not a bad choice between the two. The right optic depends on whether you want simplicity or reticle options.
For more compact carry optic options, browse our full Holosun Pistol Red Dots collection.
FAQ: Holosun 407K vs 507K
What is the main difference between the Holosun 407K and 507K?
The main difference is the reticle. The 407K has a 6 MOA dot, while the 507K has a 2 MOA dot, 32 MOA circle, or circle-dot reticle.
Do the Holosun 407K and 507K use the same footprint?
Yes. Both use the Holosun K footprint. Always confirm your slide cut, adapter plate, and mounting screws before ordering.
Are the 407K and 507K the same size?
Yes. Both have a 0.58″ × 0.77″ window, 1.6″ × 0.98″ × 0.95″ body dimensions, and 1 oz weight.
Is the Holosun 407K or 507K better for concealed carry?
The 407K is better if you want a simple concealed carry optic with a 6 MOA dot. The 507K is better if you want multiple reticle options in the same compact footprint.
Is the 507K worth the extra money over the 407K?
The 507K is worth it if you want the Multi-Reticle System. If you only want a simple 6 MOA dot, the 407K is usually the better value.
Does the 507K have a green dot variant?
Yes. The 507K is available in a green dot variant and a red dot version.
Does the 407K have a green dot variant?
Yes. The 407K is available in red, green, and gold dot variants depending on current inventory.
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