C+H Precision Optics Adapter Plate for SIG P320 RX/Pro Series w/Romeo 1 Pro Optic Ready Cut and Trijicon RMR/SRO/RCR, Holosun 407C/507C/507Comp | Made in the USA

While this seemed a bit pricy for what it is. I recognized the quality of the piece. The dimensions were perfect, aligning with holes, front and back, and sides. The enclosed screws fit perfectly. And the plate not only matched the firearm, but also the optic without any need for modification or adjustments. Installation videos are available and they were comprehensive. I also contacted C&H with some questions and they were very good to offer technical advice and help. I am very pleased with this product, glad I decided to get it, and I do recommend it.

Excellent fit for my CA320 (California Legal P320 M18 made by Franklin Armory). No gap and the needed screws came with the plate. This was for a Trijicon type 2 RMR. Looks great! If you are thinking about a cheaper plate, don't do it. I bought 3 different plates. This one is higher priced but you get higher quality, feels more durable, same thickness, and a more confident fit.

Perfect fit.

P320 XFull with Holosun 507C. Plate is very minimal in thickness, does the job to block the extractor holes. Also has locator pins for the Holosun as well as on the underside to the slide itself. This is what makes this plate worth the extra money. The kit comes with 2 sets of screws, a long and a short set. The short set is what is needed to mount the 507C. On the right side, it was a bit too long and impacted the extractor. The screw was 9.45mm long and needed to be sanded down to 9.15mm before it would clear. I removed my extractor and kept sanding the screw down until I could reinstall it. YMMV

The plate works exceptionally well, providing a stable and reliable platform for my sight. Its thin profile is a major plus, as it adds minimal bulk, maintaining the sleek look and feel of my gun. The craftsmanship is evident; it is well made and feels sturdy, ensuring longevity and durability. Additionally, the installation process was straightforward and hassle-free, making it easy for anyone to set up. Overall, I highly recommend this red dot plate for anyone looking to enhance their shooting experience with a high-quality and easy-to-use accessory.

Wanted to mount Holosun 507c RMR footprint to Sig P320 X-5 DH3 and Sig X-Ten. Found out the hard way can direct mount destroys extractor spring and unfortunately it took Sig for me to find this out. These CH plates are very high quality and very easy installation with correct torque wrench and torque bite. Definitely worth the $100 price tag and lucky both handguns was under warranty and Sig sent me two new extractor springs. Don’t make the same mistake. These plates don’t work on M17’s & M18 and any P320 that has bullet in chamber indicator.

I purchased a Holosun 507c and this plate for my Sig P320 LE Full Size. Our armorer put it on in 20min. It Fit with no problem. Pricey on Amazon, but I needed it overnight.

C&H is the best. I only use them for all my guns.