The Holosun 507 COMP has quickly become a favorite among competitive shooters and concealed carriers alike. With its large window, crisp reticle, and robust feature set, it promises to elevate your shooting experience. In this review, we'll dive deep into what makes the 507 COMP stand out, how it performs in real-world scenarios, and whether it's the right optic for your pistol.
We'll cover everything from the unboxing experience to battery life, durability, and how it compares to the popular 507C. By the end, you'll know if the 507 COMP deserves a spot on your slide.
Holosun 507 COMP Overview and Key Features
The Holosun 507 COMP is a reflex sight designed with competition shooters in mind. It features a large 2 MOA dot surrounded by a 32 MOA circle, providing a fast and intuitive aiming solution. The window is noticeably larger than many competitors, offering a wider field of view that helps with target acquisition and tracking during rapid fire.
Key features include Holosun's Solar Failsafe, Shake Awake technology, and a side-loading battery compartment that allows you to change the CR1632 battery without removing the optic from your slide. The 507 COMP also offers multiple reticle options (dot, circle, or circle-dot) and 12 brightness settings (10 daylight, 2 night vision compatible).
One of the most impressive aspects is the battery life. With the solar panel and Shake Awake, the 507 COMP can run for up to 50,000 hours on a single battery (at medium brightness). This makes it a set-and-forget optic for most users.
- Large 2 MOA dot + 32 MOA circle reticle
- Solar Failsafe and Shake Awake for extended battery life
- Side-loading battery compartment – no optic removal needed
- 12 brightness settings, including 2 NV compatible
Performance on the Range: Competition and Carry
We tested the 507 COMP on a Glock 17 with a slide cut, and the performance was stellar. The large window made tracking the dot during recoil much easier compared to smaller optics. In competition drills, the circle-dot reticle helped with quick target transitions, and the dot's clarity remained crisp even in bright sunlight.
For concealed carry, the 507 COMP's size might be a concern for some, as it's slightly larger than the 507C. However, if you carry a full-size pistol, the bulk is negligible. The optic's durability is reassuring – it's made of 7075-T6 aluminum and is waterproof (IP68) and shockproof. We had no issues with zero retention after hundreds of rounds.
One thing to note: the 507 COMP is designed for a specific footprint (RMR). If you're using a pistol like the Springfield Hellcat Pro, you'll need an adapter plate. For those looking to upgrade their carry gun, the https://guerillatactical.com/products/garage-sale-low-pro-springfield-hellcat-pro-365253Garage Sale Low Pro - Springfield Hellcat Pro is a great holster option that accommodates optics.
Holosun 507 COMP vs 507C: What's the Difference?
The 507 COMP is often compared to the 507C, but they serve different purposes. The 507C has a smaller window (about 20% smaller) and uses a different reticle (2 MOA dot with 32 MOA circle, but the circle is a bit thinner). The 507 COMP's larger window is a game-changer for competition, while the 507C is more compact and better suited for subcompact pistols.
Battery life is similar, but the 507 COMP has a slightly improved solar panel and a more robust housing. The 507C is also available in multiple reticle versions, but the 507 COMP offers the same options. If you're deciding between the two, consider your primary use: if it's competition, go with the 507 COMP; if it's everyday carry on a smaller gun, the 507C might be more practical.
Battery Life and Maintenance
Battery life is a critical factor for any red dot. The 507 COMP's 50,000-hour rating is impressive, but real-world usage can vary. With the solar panel, you can extend battery life further, especially if you're outdoors. The Shake Awake feature ensures the optic powers on when you pick up your gun, saving battery when idle.
Changing the battery is a breeze thanks to the side-loading tray. You don't need to remove the optic, which means zero retention loss. We recommend checking the battery every 6-12 months and keeping a spare CR1632 in your range bag. For those who like to be prepared, the Oh $h!t Kits are a great addition to any kit, containing essential spare parts and tools.
Oh $h!t Kits
Mounting Options and Compatibility
The 507 COMP uses the RMR footprint, which is one of the most common in the industry. This makes it compatible with a wide range of slides and mounting plates. However, some pistols like the Glock 17/19 require a specific adapter plate if the slide is not cut for RMR. Holosun offers a mounting plate, but you can also use aftermarket options.
When mounting, ensure the screws are torqued to spec and use thread locker. For holster compatibility, the The Rig is an excellent choice for optics-ready pistols, providing a secure fit and easy draw. Always test your holster and optic combo for proper retention and clearance.
The Holosun 507 COMP is a top-tier red dot sight that excels in competition and performs admirably for everyday carry. Its large window, excellent battery life, and rugged build make it a worthy investment. If you're looking to upgrade your pistol optic, the 507 COMP should be at the top of your list. Check out the RMR Type 2 - 3.25 MOA as an alternative, but for most shooters, the 507 COMP offers unbeatable value.
