The Holosun 515 vs 530 comparison is primarily about two different physical formats: the compact 20mm 515 family and the larger 30mm 530 family. Both offer enclosed, non-magnified sights, but the 530 is not simply a titanium version of an otherwise aluminum 515.
Start with size: the 515 has a compact 20mm window, while the 530 offers a larger 30mm opening. You can then choose your housing material and solar features. Titanium is available in both families.
The Holosun 515 Family in Detail
The Compact 20mm Format
The 515 family uses a 20mm viewing opening within an enclosed tube-style housing. Its compact format is the common thread across the GM, CM, GT and CT models. The suffix changes the configuration, not the 20mm window size.
The compact tube-style body is the 515’s main attraction. It suits buyers who want a smaller optic rather than the largest possible viewing window.
All four 515 models have a non-magnified 1x view through a 20mm window.
515GM: The Non-Solar Aluminum Model
The GM combines a 7075 aluminum housing with battery-only power. It offers the compact 515 design without titanium construction or solar support, making it a straightforward option if neither of those features is a priority.
Its place in the lineup is straightforward: start here when you want the 515 size, its selectable dot-and-circle reticle and a replaceable battery. Compared with the larger 530, its main attraction is the smaller overall format rather than a similarly large viewing window.
515CM: Aluminum With Solar Support
The CM uses a 6061 aluminum housing and adds Solar Failsafe. It is the solar-equipped option among the aluminum 515 models.
The window remains 20mm, and the replaceable CR2032 remains part of the power system. The solar feature supplements electrical power under appropriate lighting; it does not recharge the battery. Choosing the CM adds solar support without moving to a larger optic.
515GT: Titanium in the Compact 515 Format
The GT is the titanium, non-solar option. It matters in a 515 vs 530 comparison because it shows that titanium does not require choosing the 530’s 30mm window and larger format.
The GT offers titanium construction without moving to a larger sight. Its 20mm window keeps the same compact format as the other 515 models.
515CT: Titanium and Solar Together
The CT combines titanium with Solar Failsafe. It brings those two features together while retaining the compact body and 20mm window of the 515 family.
This makes it a useful comparison with the solar-equipped 530C. Both can satisfy a preference for titanium and solar support, leaving the body format and window size as clearer reasons to choose between the families.
Reticle, Battery and Package Details
The 515 offers a selectable 2 MOA dot and 65 MOA circle and runs on a replaceable CR2032 battery.
Before buying, check the supplied mount height and accessories so the package includes what you need.
References: 515GM, 515CM, 515GT and 515CT. Our 515 model guide examines those configurations individually.
The Holosun 530 Family in Detail
A 30mm Window and Titanium Housing
The 530 family moves to a 30mm viewing opening and titanium housing. Its larger window sits within a larger body, making size the most obvious difference from the 515.
Consider the 530 if a larger viewing window is a priority. It is not just a 515 made from a different material. Even when you compare it with a titanium 515, the difference between the 20mm and 30mm windows remains.
Both families are non-magnified 1x sights. The 530 offers more viewing space, not built-in zoom.
Holosun HE530C: The Solar-Equipped Choice
The HE530C pairs the 30mm titanium format with Solar Failsafe. Choose this configuration if you want solar support in addition to battery power.
It still uses a replaceable CR2032 battery. Solar support does not turn the optic into a battery-free product or create a charging system. It adds a power source under suitable conditions but you still need to replace the battery when necessary.
When comparing the 530C with a 515, match it to a solar-equipped configuration if you want a cleaner feature comparison. A 515CT is particularly useful when titanium and solar are both preferences and the remaining question is physical format.
Holosun HE530G: The Non-Solar Choice
Choose HE530G for a 30mm titanium sight without Solar Failsafe. It comes in both red and green; the G in the model name does not specify the reticle color.
The 530G is a good fit if you want the larger window and titanium housing but do not need solar support.
Comparing the 515GT with the 530G keeps both the housing material and non-solar power configuration consistent. You can then focus on window size, body dimensions and the included mount.
Reticle and Color Selection
The standard 530 configuration uses a selectable dot-and-circle reticle with a 2 MOA dot and 65 MOA circle. Red and green variants are separate choices within the family.
Choose between the C and G configurations first, then select a reticle color. When comparing prices, keep the color the same. Otherwise, a price difference between red and green models can be mistaken for the cost of adding solar support.
References: HE530C, HE530G and Holosun’s consumer catalog.
Holosun 515 vs 530: Side by Side
| Feature | 515 family | 530 family |
|---|---|---|
| Window diameter | 20mm | 30mm |
| Housing materials | Aluminum or titanium | Titanium |
| Magnified? | No (1x) | No (1x) |
| Solar models | CM and CT | 530C |
| Non-solar models | GM and GT | 530G |
| Standard battery | CR2032 | CR2032 |
| Reticle colors in our collections | Red and green | Red and green |
20mm vs 30mm Viewing Windows
The 530 has a 50% wider window: 30mm versus 20mm. Both remain non-magnified sights.
A larger opening can be desirable, but the larger body is part of the same decision. If compactness is a benefit for you, the 515 can remain the preferred format even when price is not the deciding factor.
Aluminum and Titanium Options
You do not need to move up to the 530 to get titanium. The 515GT and 515CT offer titanium housings in the smaller 20mm format.
If weight matters, compare the complete sight and mount. Housing material alone does not tell you how much the finished setup weighs.
Mounts, Accessories and Value
An included mount can make a package better value, especially if you would otherwise need to buy one separately.
The best value depends on the exact configuration and package contents, not just the lowest starting price in each family. Compare the complete packages you would actually buy, including any mount or accessory you would otherwise need to purchase separately.
Which Family Should You Choose?
Start with the 515 if you want the smaller format and value the ability to choose aluminum or titanium within it. Then use the suffix to select solar or non-solar operation.
Start with the 530 if a larger 30mm opening is the reason you are shopping and you want a titanium housing. Choose C for solar support or G for the non-solar configuration, then select the reticle color.
Browse the Holosun 515 collection and Holosun 530 collection. For another enclosed rifle-optic comparison with a different mix of features, see ARO Core vs ARO EVO.
515 vs 530 FAQs
No. The GM and CM use aluminum housings, while the GT and CT use titanium.
No. Both are non-magnified 1x sights. Their different window diameters describe the size of the viewing opening.
The HE530C adds Solar Failsafe. The HE530G uses battery power without the solar panel.
No. Both HE530G and HE530C come in red and green reticle versions.
A 515CT is a useful comparison when you want to keep titanium and solar support while moving to the smaller 20mm family. Compare the included mounting hardware as well.
No. You may prefer its larger window, or the compact 515 may suit you better. Consider both the viewing opening and the body size when choosing between them.
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