SIG V4 Optic Plates Adapters

C&H Precision

$55.99
SIG P320 RX / PRO / AXG • HOLOSUN K / EPS / 509T • OPTIC PLATE ADAPTER • VERIFY SCREWS
C&H Precision • SIG P320 RX / AXG Optic Mounting Plate

SIG P320 RX/AXG Optic Plate Adapter

Match the optic cut. Match the footprint. Don’t let tiny screws turn into expensive little gremlins.

P320 RX Pro Series AXG 407K / EPS / 509T

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.

Variant Selection Matters
RX / PRO / AXG CUT FIRST. OPTIC FOOTPRINT SECOND.

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.

Fitment
  • 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.
Does NOT Fit
  • 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.
Available Variants
SGRX-HOLOk
P320 RX / Pro Series / AXG
Holosun 407K / 507K, Vortex Defender CCW, C&H EDC / EDC Enclosed, Olight Osight S
SGRX-EPS
P320 RX / Pro Series / AXG
Holosun EPS / EPS Carry / SCS Carry
SGRX-509T-ST
P320 RX / Pro Series / AXG
Holosun 509T • Steel plate
What It Does

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.

Why It’s Worth It

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.

Tools Needed
  • 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
Install Notes
  • 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.
Specs
Brand
C&H Precision
Product Type
Optic plate adapter
Plate Family
SGRX
Compatible Slide Cut
SIG P320 RX / Pro Series / AXG style optic cut
Variant Option
Optic footprint selection
Verify Before You Buy
  • 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.

MATCH THE CUT • MATCH THE FOOTPRINT • VERIFY SCREWS • TORQUE PROPERLY

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