C&H Precision SIG P320 Legion M17 M18 R1P DPP Cut to Trijicon RMR SRO RCR Holosun Optics Adapter Plate Steel with Glock Dovetail MPN SGX RSH GDT ST UPC 616943741247
Product Description
The C&H Precision Steel Optics Adapter Plate with Integrated Glock Rear Dovetail (SKU: SGX-RSH-GDT-ST / UPC: 616943741247) is the definitive combat-grade mounting solution for mounting full-size reflex sights to your military-issue or competition SIG Sauer pistol. Designed and manufactured in Coastal Georgia, this heavy-duty adapter bridges the gap between factory SIG slides featuring the Romeo1 Pro / DeltaPoint Pro cut and the world’s most proven miniature red dot optics, restoring critical backup iron sight (BUIS) functionality on slides that lose their factory rear sight assembly when unmasked.
Engineered from solid billet ordnance-grade mild steel on high-precision HAAS CNC machining centers, this plate delivers superior rigidity, impact strength, and shear resistance compared to standard lightweight aluminum adapters. The solid steel architecture prevents mounting screw flex, eliminates micro-shifting during harsh slide reciprocation, and survives relentless law enforcement duty or open-division competition match abuse. Coated with an ultra-durable protective black finish, each plate features C&H’s patented 416 stainless steel T-posts, offering maximum thread engagement and the ability to replace mounting posts if damaged without discarding the primary plate body.
The topside interface accommodates standard Trijicon RMR/SRO footprints—including the Holosun 407C, 507C, 507Comp, 508T, Trijicon RCR, and C&H EDC-XL/COMP series. Integral to the rear chassis is a CNC-machined dovetail engineered to accept standard Glock-pattern rear iron sights. This configuration allows tactical operators and defensive carry users to drift-fit their preferred night sights or suppressor-height sights directly behind the optic window, providing an uncompromising lower-third or absolute co-witness sight picture.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Engineered exclusively for SIG Sauer P320 slides that lose the rear sight upon removing the factory plate (P320 M17, M18, M17X, M18X, P320 X-Five Legion, X-Carry Legion, and XFive SXG with factory R1P/DPP cut). CRITICAL FITMENT NOTICE: This plate is NOT compatible with newer SIG P320 slides that retain an independent dovetail rear sight behind the optic plate cut. If mounting a Trijicon RCR, use the factory proprietary Trijicon RCR capstan screws; check thread depth carefully to prevent bottoming out against the slide. Use a calibrated torque driver set strictly to manufacturer torque ratings (10–12 in-lbs for plate-to-slide, 12–15 in-lbs for optic-to-plate). Always use medium-strength (blue) threadlocker and allow a full 24-hour cure before live fire.
- Ensure the host firearm is completely clear, magazine removed, and chamber visually and physically confirmed empty.
- Remove the slide assembly and disassemble the factory rear sight cover plate by loosening the underside slide retention screws, ensuring the safety lock and extractor pin components remain seated.
- Thoroughly degrease the slide optic pocket, plate screw channels, patented stainless steel T-posts, and mounting fasteners using 90%+ isopropyl alcohol or dedicated solvent.
- Drop the patented 416 stainless steel T-nuts into the plate underside, position the steel adapter plate into the slide's Romeo1 Pro/DPP footprint, apply a drop of blue threadlocker, and torque the plate-to-slide screws evenly to 10–12 in-lbs.
- Drift-install your chosen Glock-spec rear sight into the rear dovetail with an armorer sight pusher, position your red dot optic onto the plate, secure the optic using the appropriate included stainless steel fasteners torqued to 12–15 in-lbs, and allow threadlocker to fully cure for 24 hours prior to range zeroing.
Key Features
- CNC-Machined Ordnance Steel: Maximum tensile strength and impact resistance to prevent plate flex or shearing under violent slide acceleration.
- Integrated Glock Rear Dovetail: Restores backup iron sight capability by accepting standard Glock-pattern rear sights directly behind the optic.
- Patented Replaceable T-Post Hardware: Employs 416 stainless steel T-nuts for deep, secure thread engagement, safeguarding your slide and optic from stripped threads.
- Multi-Optic Footprint Versatility: Direct interface for Trijicon RMR, SRO, RCR, Holosun 407C/507C/507Comp/508T, C&H EDC-XL, and COMP series red dots.
- Complete Mounting Hardware Included: Shipped with firearm-specific plate mounting screws and tailored optic mounting fasteners for straightforward installation.
- Made in Coastal Georgia, USA: Engineered, manufactured, and inspected by veteran machinists to strict military-grade tolerances.
Product Specifications
- Brand: C&H Precision®
- Model/Series: Steel Optic Adapter Plate with Glock Dovetail
- MPN / SKU: SGX-RSH-GDT-ST
- UPC: 616943741247
- Platform Compatibility: SIG Sauer P320 M17, M18, X-Five Legion, X-Carry Legion (Slides losing rear sight with cover)
- Slide Cut Pattern: SIG Romeo1 Pro (R1P) / Leupold DeltaPoint Pro (DPP)
- Optic Footprint: Trijicon RMR / SRO (Holosun 407C, 507C, 507Comp, 508T, C&H COMP/EDC-XL)
- Rear Sight Dovetail Cut: Standard Glock Pattern
- Material: Ordnance Mild Steel
- Hardware Material: 416 Stainless Steel (T-Posts and Screws)
- Finish: Matte Black Protective Surface Treatment
- Country of Origin: United States
