C&H Precision Sig P320X/M17/M18 Adapter Plate with Rear Sight - Trijicon RMR and Holosun 407C/507C
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- 90-day no-hassle returns policy
- Manufacturer Defect what it covers
Product description
Adapt Your Sig P320 to the Popular RMR Footprint
The C&H Precision Sig P320X Optic Adapter Plate lets you mount Trijicon RMR and Holosun 407C/507C optics to your Sig Sauer P320 pistol. Made specifically for Sig Sauer P320X series, M17, and M18 pistols, this adapter plate ensures secure attachment while also providing a rear sight that you would normally lose when installing a red dot.
Compatibility
Converts the Sig Romeo 1 Pro footprint on your slide to securely mount Trijicon RMR footprint optics such as the Trijicon RMR, Trijicon SRO, Holosun 407C, and Holosun 507C to name a few. Please check if your P320 has the Romeo 1 PRO footprint as opposed to the older Romeo 1 footprint. Additionally, make sure your P320 has a Plate Integrated Rear Sight.


Precision Machined
Made from quality 6061 aluminum for long-lasting durability, ensuring a solid and stable fit for your optic under heavy recoil and rigorous use. Every C&H Optic Plate is designed, manufactured, and machined in the United States at a small family owned business. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping to customers.
Low-Profile Design
Maintaining a thin and unobtrusive profile keeps your firearm looking good and doesn’t raise your optic absurdly high.
Secure Fit
It provides a rock-solid connection between the optic and slide, preserving your zero for consistent accuracy.
Simple Installation
Includes all necessary hardware to mount to your slide for straightforward installation, making it easy to adapt your firearm to the optic without additional or permanent modifications. Use the screws provided with the optic to install the optic to the plate.
Specifications
- Brand: C&H Precision
- Model: Sig P320X/M17/M18 Optic Adapter Plate with Rear Sight – Trijicon RMR and Holosun 407C/507C
- MPN: CPSGX-RSH-10-8
- Fit:
- Firearm Slide and Optic Mount – Sig Romeo 1 Pro / DPP
- Optic – Trijicon RMR/SRO, Holosun 407C/507C, Holosun 507 COMP, and many more red dots using the RMR Footprint
- Material: 6061 Aluminum and 416 Stainless Steel T-Posts
- Finish: MIL-SPEC Type III Hard Anodized
NOTE: Your Sig Sauer P320 may already have RMR holes installed on the slide. Sig Sauer has quietly been doing this for a few years now so remove your OEM plate and check before ordering this optic plate adapter.
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Questions & Answers
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Warranty & returns
Manufacturer Defect
C&H Precision takes pride in its products and strives to produce quality items. They stand behind their work 100%, however, they are human and mistakes sometimes happen… in this case, they will fix their mistakes to your satisfaction.
If you believe your product is defective, damaged or missing parts, contact C+H Precision using their website.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.











