SIG P320 RX/AXG Optic Plate Adapter
Match the optic cut. Match the footprint. Don’t let tiny screws turn into expensive little gremlins.
PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.
These C&H Precision optic plate adapters are built for SIG P320 RX / Pro Series / AXG style optic cuts. Choose the variant that matches your optic footprint before ordering.
This is a fitment-critical optic mounting part. The slide cut, adapter plate, optic footprint, and screw length all need to line up clean. Optic mounting is not the place to freestyle unless your hobby is chasing zero and inventing new profanity.
The P320 optic cut matters just as much as the optic itself. Select the correct SGRX adapter based on your slide cut and optic footprint.
- CPSGRX-HOLOK / SGRX-HOLOk: SIG P320 RX / Pro Series / AXG to Holosun 407K / 507K, Vortex Defender CCW, C&H EDC / EDC Enclosed, and Olight Osight S.
- CPSGRX-EPS / SGRX-EPS: SIG P320 RX / Pro Series / AXG to Holosun EPS / EPS Carry / SCS Carry.
- CPSGRX-509T-ST / SGRX-509T-ST: SIG P320 RX / Pro Series / AXG to Holosun 509T. Steel plate version.
- Not for P320 slides that are not the RX / Pro Series / AXG style optic cut called out by C&H for the SGRX line.
- 509 ACSS / Primary Arms is not the same as Holosun 509T and requires a different plate.
- Do not assume compatibility with older, non-RX, non-Pro, or non-AXG P320 optic cuts unless verified.
- Do not assume screw compatibility without checking screw length and thread engagement.
This adapter plate bridges the SIG P320 RX / Pro Series / AXG optic cut to the selected optic footprint. It gives the optic the correct mounting interface so the sight can seat properly, mount securely, and stay aligned through recoil.
Optic mounting lives or dies by fitment and hardware. The right plate keeps the optic mounted on the correct footprint instead of forcing parts together like a caveman with a torque driver. Small part, big job.
- Inch-pound torque driver
- Correct bit for your screws, based on the plate and optic being mounted
- Clean bench or parts tray
- Blue threadlocker only if recommended by the optic/plate instructions
- Dry-fit plate, optic, and screws before final install.
- Verify screw length so screws do not bottom out or protrude into the slide.
- Torque properly using an inch-pound torque driver.
- After mounting, verify optic seating, screw engagement, slide function, and zero before live fire.
- Verify your SIG P320 slide uses the RX / Pro Series / AXG style optic cut called out by C&H for the SGRX plate family.
- Select SGRX-HOLOk for Holosun 407K / 507K, Vortex Defender CCW, C&H EDC / EDC Enclosed, and Olight Osight S.
- Select SGRX-EPS for Holosun EPS / EPS Carry / SCS Carry.
- Select SGRX-509T-ST for Holosun 509T.
- Do not use this for 509 ACSS / Primary Arms.
- Verify screw length and torque before live fire.
⚠ Install & Compatibility Disclaimer
Optic mounting is function-critical. Use correct screws and screw lengths, torque properly, and function-check before live fire. If unsure, use a qualified armorer or gunsmith.
⚠ Trademark & Compatibility Disclaimer
All manufacturer names and model designations are used for compatibility reference only. Trademarks belong to their respective owners.