The FN Five-seveN pistol, known for its unique 5.7x28mm cartridge and impressive accuracy, has gained popularity among both law enforcement and civilian shooters. However, its small slide and frame present challenges when it comes to mounting optics. This guide will delve into the various FN Five-seveN optic mounts available, their pros and cons, and help you choose the best option for your needs.
Understanding the Challenges of Mounting Optics on the FN Five-seveN
The FN Five-seveN's compact design makes it difficult to directly attach optics like red dots or reflex sights. Traditional mounting solutions often require significant modifications to the pistol's slide or frame, which can compromise its integrity and reliability. This is why specialized optic mounts have become essential for those seeking to enhance the pistol's accuracy and versatility.
Types of FN Five-seveN Optic Mounts
Several types of optic mounts are available for the FN Five-seveN, each with its own advantages and disadvantages:
1. Adapter Plates:
Adapter plates are a common solution. These plates attach to the pistol's existing rear sight dovetail, allowing you to mount a red dot sight with a compatible footprint (e.g., Trijicon RMR, Shield RMSc).
- Pros: Relatively inexpensive, easy to install, often reversible (allowing you to return to iron sights).
- Cons: Can add significant height to the optic, potentially affecting co-witnessing with iron sights and disrupting the pistol's natural point of aim. Some models might require gunsmithing or modification for a secure fit.
2. Slide-Mounted Optics:
Some manufacturers offer custom slides with integrated optic cuts specifically designed for the FN Five-seveN. These slides usually require professional installation and are often more expensive than adapter plates.
- Pros: Lower profile than adapter plates, potentially offering improved co-witnessing, potentially more robust and secure mounting system.
- Cons: Expensive, requires professional installation, permanently alters the pistol's slide, may void warranties.
3. Aftermarket Frames:
While less common, some specialized aftermarket frames incorporate integrated optic mounts. This option is the most significant modification, altering the pistol's core structure.
- Pros: Potentially the most robust and reliable mounting solution, low profile.
- Cons: Extremely expensive, requires significant modifications, voids warranties, legally questionable in some jurisdictions depending on regulations.
Factors to Consider When Choosing an Optic Mount
Selecting the right optic mount depends on several factors:
- Budget: Adapter plates are the most affordable option, while custom slides and aftermarket frames are significantly more expensive.
- Desired Optic: Ensure the mount is compatible with your chosen red dot or reflex sight. Check the manufacturer's specifications for compatibility.
- Skill Level: Installing some mounts might require specialized tools and knowledge. Adapter plates are generally easier to install than custom slides or frames.
- Legality: Check local and state laws regarding firearm modifications before making any changes to your FN Five-seveN.
Conclusion
Choosing the right optic mount for your FN Five-seveN is a crucial decision that impacts accuracy, usability, and overall performance. Carefully consider the factors discussed above and choose the option that best suits your needs and budget. Always ensure that the installation is performed correctly, ideally by a qualified gunsmith, to avoid potential safety issues. Remember to always prioritize safety and adhere to all relevant laws and regulations.
