First Impressions of C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate
The C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate promises a robust and versatile solution for mounting RMR-footprint optics to SIG P320 slides originally cut for the ROMEO1 Pro. It addresses the challenge of adapting different optic footprints, a common issue when upgrading or changing red dot sights. This adapter plate aims to provide a secure and reliable mounting platform, crucial for maintaining zero and optimal performance, particularly in demanding tactical and competitive shooting scenarios. My initial excitement stems from the potential to bridge the gap between optic compatibility and slide configuration on my P320, simplifying upgrades and improving overall weapon versatility.
I needed to mount a Holosun 507C on a P320 X-Carry slide that was originally designed for the SIG ROMEO1 Pro, but also came with the RMR mounting holes. The filler plate seemed to be the perfect solution to avoid having the unsightly unused holes present with other adapter plates. When the plate arrived, its minimalist design immediately caught my eye. The weight was surprisingly light, and the black anodized finish appeared well-executed.
Compared to similar adapter plates from other manufacturers, like those from Forward Controls Design or even SIG Sauer themselves, the C&H Precision Weapons plate stood out due to its claim of not needing additional screws for mounting. The other options either required additional screws or were adapter plates with additional screws to use an RMR footprint optic on a slide without existing RMR holes. I chose this plate hoping for a cleaner, simpler installation process. I was cautiously optimistic.
Real-World Testing: Putting C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate to the Test
First Use Experience
My first experience with the C&H Precision Weapons filler plate was at my local indoor shooting range, where I primarily tested its fit and stability with the Holosun 507C mounted on my SIG P320 X-Carry. I shot approximately 200 rounds of 115 grain 9mm ammunition through the pistol. The plate installed easily enough, though I immediately noticed a slight gap at the front of the slide, as mentioned in some of the user reviews.
Under controlled conditions, the filler plate seemed to perform adequately initially. However, I noticed some movement of the plate after the first few magazines through the pistol. This initial movement raised concerns about long-term reliability and zero retention, especially under more rigorous use.
Extended Use & Reliability
After several weeks of consistent use and roughly 1000 rounds fired, the initial concerns about the plate’s stability were validated. While the plate itself didn’t show any visible signs of wear and tear, the screws holding the Holosun 507C in place required constant re-tightening. This recurring issue ultimately led to inconsistent zeroing and diminished confidence in the setup.
The C&H Precision Weapons filler plate is relatively easy to clean, requiring only a quick wipe-down with a microfiber cloth after each range session. Compared to other mounting solutions I’ve used in the past, which typically involve more robust screw tightening and thread-locking compounds, the performance of this plate was disappointing. The movement of the plate during firing undermined its intended purpose.
Breaking Down the Features of C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate
Specifications
The C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate is designed specifically for SIG Sauer P320 RX/X Series slides that have a ROMEO1 Pro optic cut with RMR mounting holes. The plate is made from 6061 Aluminum, with Stainless Steel components, and features a Mil-Spec Type III Hard Anodized finish for enhanced durability. The RMR footprint compatibility allows for mounting Trijicon RMR, Trijicon SRO, Holosun HS507C, and other optics with the same footprint.
Weighing in at just 0.3 lbs and with dimensions of 0.95 – 0.99 in (Depth/Thickness) x 0.25 in (Height), the plate is designed to be lightweight and low-profile. Its slim design allows for potential co-witnessing with suppressor-height sights. These specifications are important because they dictate the plate’s compatibility with specific slide configurations and optic footprints, influencing its overall utility and ease of installation.
Performance & Functionality
In theory, the C&H Precision Weapons filler plate is supposed to provide a stable and secure mounting platform for RMR footprint optics on SIG P320 slides with both ROMEO1 Pro and RMR cuts. However, the actual performance falls short of expectations. The plate’s primary weakness lies in its inability to maintain a consistent zero due to its movement under recoil.
The minimal gap at the front of the slide and the lack of a truly secure locking mechanism contribute to this instability. While the concept of using the optic’s mounting screws to hold the filler plate in place is innovative, it proves insufficient in practice. This is because the tolerance stack up between the slide, the filler plate, and the optic screws does not provide enough clamping force to securely hold the optic and plate together.
Design & Ergonomics
The C&H Precision Weapons plate’s design is sleek and unobtrusive. Its low-profile allows for a comfortable shooting experience and potential co-witnessing with raised sights. The build quality appears to be high initially, with a clean anodized finish and precise machining.
However, the lack of a tight fit between the plate and the slide undermines its ergonomic benefits. The slight movement of the plate can be felt during shooting, which is distracting and negatively impacts accuracy. The plate is simple to install, requiring only a few minutes and basic tools, however, its functional design flaw overshadows this ease of use.
Durability & Maintenance
The 6061 Aluminum construction and Mil-Spec Type III Hard Anodized finish suggest that the C&H Precision Weapons filler plate should be durable and long-lasting. The plate itself shows no visible signs of wear and tear after extensive use. However, the recurring need to re-tighten the optic mounting screws raises concerns about the longevity of the entire system.
Maintenance is straightforward, requiring only occasional cleaning with a soft cloth. The need to constantly monitor and re-tighten screws, however, adds an extra layer of maintenance that is not ideal. The product design does not account for the continuous tension or shock during standard pistol firing.
Accessories and Customization Options
The C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate comes with the filler plate itself and the necessary screws for mounting an RMR-footprint optic. There are no included accessories beyond this, and customization options are limited. The plate is specifically designed to adapt RMR footprint optics to the SIG P320 RX/X Series slides.
Compatibility is limited to optics with the RMR footprint. While many popular red dot sights, such as those from Trijicon and Holosun, adhere to this standard, users are restricted to this specific mounting pattern. There is little room for additional customization beyond the choice of optic.
Pros and Cons of C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate
Pros
- Sleek, low-profile design.
- Compatible with popular RMR footprint optics.
- Easy to install.
- Lightweight construction.
- Provides a solution for using RMR optics on SIG P320 slides with a ROMEO1 Pro cut and RMR holes.
Cons
- Does not maintain consistent zero due to movement under recoil.
- Requires frequent re-tightening of optic mounting screws.
- Slight gap at the front of the slide.
Who Should Buy C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate?
This filler plate might be suitable for casual shooters who prioritize aesthetics and easy installation over absolute stability and zero retention. It could also serve as a temporary solution while waiting for a more robust mounting system. Individuals with SIG P320 RX/X Series slides with both ROMEO1 Pro and RMR cuts are the target audience.
Competitive shooters, law enforcement personnel, and anyone who relies on their pistol for self-defense should probably skip this product. The inability to maintain a consistent zero is a critical flaw that renders it unsuitable for high-stakes applications. A more reliable and secure mounting solution is essential for these users.
Conclusion on C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate
The C&H Precision Weapons SIG Sauer P320 RX/X Series ROMEO1 Pro w/ RMR Holes Filler Plate presents a promising concept with a flawed execution. While it offers a sleek and easy-to-install solution for adapting RMR footprint optics to SIG P320 slides with a ROMEO1 Pro cut and RMR holes, its inability to maintain a consistent zero undermines its overall utility. The price point of $60.45 may seem reasonable, but the lack of reliable performance doesn’t justify the cost.
I would not personally recommend this product due to its instability and the need for constant maintenance. There are more robust and reliable mounting solutions available on the market that offer greater peace of mind and superior performance. For serious shooters, investing in a higher-quality mounting system is well worth the extra expense.