Guide

    Holosun 407COMP 6 MOA Open Pistol Red Dot Sight (HS407COMP-RD-6): Specs, Mounting, and Competition Performance

    Holosun 407COMP Open Pistol Red Dot Sight 6 MOA (HS407COMP-RD-6)

    Introduction

    The Holosun 407COMP 6 MOA Open Pistol Red Dot Sight (HS407COMP-RD-6) is purpose-built for shooters who care about one thing above all else: getting an unmistakable dot into your vision fast, then keeping it there through recoil so transitions stay clean and repeatable. With a bold 6 MOA red dot, true 1x viewing, and a competition-friendly open-emitter window, the 407COMP is a strong fit for USPSA/Steel Challenge-style stage work, high-volume training, and practical pistol setups where speed matters.

    What makes this optic stand out in the “carry-size price / competition-window behavior” space is the combination of a large viewing window (Holosun lists 1.1 × 0.87 in for the COMP housing family), a 7075-T6 aluminum housing, side-tray CR1632 battery, and Holosun’s familiar Shake Awake and memory features—giving you a set-it-and-run-it experience without constantly re-confirming brightness or rezeroing after battery swaps. (Window size and core feature set are listed by Holosun on the 407COMP family page.) (holosun.com)

    Key Features and Specifications

    Here are the most decision-relevant specs and what they mean on the range.

    • Reticle: 6 MOA red dot

      • A 6 MOA dot is intentionally “easy to see” and tends to be quicker to pick up during imperfect presentations and faster during target-to-target transitions.

    • Magnification: 1x

      • Keeps your sight picture natural for both-eyes-open shooting and makes it easy to stay visually target-focused.

    • Optic type: Open-emitter pistol reflex sight

      • Open emitters typically offer excellent window openness and speed, with the tradeoff that mud/debris/water can obstruct the emitter path more easily than enclosed designs.

    • Housing material: 7075 aluminum (7075-T6 noted in the manual)

      • 7075 is a high-strength aluminum commonly used when durability and recoil resistance are priorities. (holosun.eu)

    • Battery: CR1632, side-loading battery tray

      • Side-tray power is a practical advantage: you can replace the battery without removing the optic, which helps preserve your zero. Holosun lists the side-tray CR1632 setup on the 407COMP family page. (holosun.com)

    • Durability / environmental:

      • IP67 waterproof rating (manual)
      • 5000G vibration rating (Holosun family page)
      • Parallax: manual notes parallax < 1 MOA in its optical system description
      • These specs support confidence for high round counts and adverse weather use. (holosun.eu)

    • Brightness settings: manual indicates models may have 10/12 settings (varies by model)

      • This matters if you move between indoor bays, bright sun, and shaded stages. (holosun.eu)

    • Mounting footprint: RMR footprint compatibility

      • The current Holosun manual for 407/507COMP states the mount is compatible with the RMR footprint, which is a major plus for slide cuts and plates already set up for that standard. (holosun.eu)

    What’s in the box (commonly included): Holosun EU’s product listing for HS407COMP-RD6 shows the optic plus small tools/screws and CR1632 batteries in the package (note: exact contents can vary by distributor/region, but it’s a helpful expectation-setter). (holosun.eu)

    Practical Applications

    1) USPSA / Steel Challenge / action pistol competition

    • The 6 MOA dot is the headline for match speed: it’s easier to catch in your peripheral vision during fast draws and aggressive movement.
    • The COMP-style window size (Holosun lists 1.1 × 0.87 in for this housing family) supports quicker dot reacquisition when your presentation isn’t perfect. (holosun.com)

    2) High-round-count training and recoil management

    • A durable housing material (7075) plus the stated vibration resistance help the optic stay consistent through sustained practice.
    • Side-loading battery reduces the “maintenance penalty” that leads many shooters to postpone battery changes.

    3) Defensive-oriented pistol setups (with realistic expectations)

    • Open emitters can work well for defensive training and carry, especially because Shake Awake helps ensure the dot is ready when the gun moves.
    • If your environment frequently includes heavy rain, lint/dust, or the possibility of occluding debris, consider whether an enclosed emitter optic is a better fit—but for most range/training contexts, open emitter designs remain popular due to window feel and weight.

    4) Mounting strategy across common pistols

    • Because the 407/507COMP manual specifies RMR footprint compatibility, it’s often straightforward to pair this optic with:
      • Slides cut for RMR
      • RMR-pattern plates on modular optic systems
    • Practical tip: even within the “same footprint,” screw lengths and boss heights vary by slide/plate maker. Always confirm engagement depth and avoid bottoming screws into the extractor plunger channel (common on some pistols).

    Expert Analysis

    From a product-research perspective, the Holosun 407COMP 6 MOA Open Pistol Red Dot Sight (HS407COMP-RD-6) is best understood as a “competition-leaning” optic that keeps the control scheme and battery system simple.

    Why 6 MOA is a legitimate performance choice (not just preference):

    • For closer/faster arrays, dot visibility is often the bottleneck—not mechanical accuracy.
    • A 6 MOA dot is easier to confirm under bright light and during recoil, especially for shooters who don’t want to run maximum brightness all the time.

    Why the side-tray battery matters more than people think:

    • Top-loading or bottom-loading battery designs frequently require removing the optic, which often means re-torquing and verifying zero.
    • Side-tray CR1632 is a practical, time-saving ownership feature—particularly for competition shooters who change batteries on a schedule.

    Mounting and torque discipline:

    • The Holosun manual specifies tightening mounting screws to 1.7 Nm (about 15 in-lb). Use a quality torque driver and proper threadlocker where appropriate, and re-check after your first live-fire session. (holosun.eu)

    Who should choose this optic:

    • Shooters prioritizing speed, window usability, and low-hassle battery changes.
    • Anyone already invested in RMR footprint slides/plates who wants an easy upgrade path.

    Who might choose something else:

    • If you regularly shoot in heavy mud/rain/snow, an enclosed emitter can be more forgiving.
    • If you strongly prefer a finer aiming point for longer handgun shots, a smaller MOA dot may fit your style better.

    Conclusion

    The Holosun 407COMP 6 MOA Open Pistol Red Dot Sight (HS407COMP-RD-6) delivers the core ingredients competition shooters value: a bold 6 MOA dot, a large, fast window, durable 7075 construction, IP67 protection, and a side-loading CR1632 battery system that supports consistent, low-maintenance use. Add in RMR footprint compatibility and Holosun’s Shake Awake/memory behavior, and you get a pistol optic that’s easy to mount, easy to live with, and fast on the clock.

    If your priority is quicker dot pickup and smooth transitions—without stepping into more complex reticle systems—the 407COMP 6 MOA configuration is a clean, performance-forward choice.

    Sources

    Holosun. "HE407COMP-GR6 (407COMP) Product Page (Overview/Specifications)." Holosun.com. Accessed March 31, 2026. https://www.holosun.com/products/pistol-sights/407comp/he407comp-gr6.html

    Holosun (EU). "HS_407-507COMP_manual.pdf." Holosun.eu. Published March 26, 2026. https://www.holosun.eu/media/43/64/77/1773054881/HS_407-507COMP_manual.pdf

    Holosun (EU). "Holosun HS407COMP-RD6 Product Information." Holosun.eu. Accessed March 31, 2026. https://www.holosun.eu/sr/p/70192889