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Sig Sauer® P320 Full-Size SXG Heavy Stainless Steel Grip Module Kit – Premium Matte Black Nitron® Finish – Includes LOK Grips® Matte Black G10 Panels & Backstrap – Removable Stainless Steel Magwell Funnel – 8901520
Product Description
The Sig Sauer® P320 Full-Size SXG Heavy Stainless Steel Grip Module Kit (8901520) represents the absolute pinnacle of modular handgun framing architecture, match-grade recoil mitigation loops, and ultra-premium weapon staging. Engineered directly by Sig Sauer’s elite engineering division, this solid-metal frame completely reimagines the performance envelope of the striker-fired platform. While traditional polymer grips provide a lightweight profile for carrying convenience, they suffer from torque flex and snappy muzzle rise under high-velocity strings, stalling your split-second target reacquisition. The SXG module completely disrupts this paradigm, anchoring your favorite P320 Fire Control Unit (FCU) inside an unyielding, rock-solid metal matrix that transforms your duty slide or competition runner into an incredibly flat, soft-shooting performance masterpiece.
The core structural victory of this heavy-metal upgrade relies on its premium, CNC-machined solid stainless steel construction covered in an advanced, corrosion-resistant matte black Nitron® surface armor. Tipping the scales at a massive 22 ounces bare, the SXG frame infuses serious, non-flexing steel mass exactly where it matters most: directly beneath the bore axis line. This deliberate weight shifting anchors the pistol securely in the master hand, acting as a massive inertial damper against violent slide cycling waves and hyper-velocity recoil spikes. To secure perfect tactile registration, Sig Sauer partnered with LOK Grips® to furnish the kit with custom-sculpted, matte black G10 grip panels and a matching G10 backstrap detailed with aggressive reverse checkering textures. This high-friction composite skin locks into your hands without creating abrasive hot spots, providing absolute slip-resistance through extreme ambient heat, heavy sweat, or foul weather conditions.
The true technical triumph of this American-engineered combat deck lies within its **comprehensive match-ready staging layout and advanced shock-absorption mechanics**. Recognizing that high-round-count steel actions take massive cyclical beatings, the SXG kit comes complete with an innovative, specialized **SXG slide catch assembly containing a green high-durability rubber damper pin** to actively slow down mechanical impact stresses. The grip base is completed with a **removable flared stainless steel magwell funnel**, creating a wide, positive insertion gate for instantaneous blind reloads under heavy match stress. Outfitted with a standard 5-slot M1913 Picatinny rail track to seamlessly host full-size duty lights, this elite 8901520 upgrade grants you absolute structural, geometric, and mechanical authority over your defensive or tournament shooting workspace.
Includes: (1) Authentic Sig Sauer P320 Full-Size SXG Solid Stainless Steel Grip Module Core (Matte Black Nitron Finish, Ambidextrous Magazine Release Installed), (2) Pre-Installed LOK Grips Matte Black G10 Reverse Checkered Panels, (1) LOK Grips Matte Black G10 Backstrap, (1) Factory Removable Flared Stainless Steel Magwell Funnel, and (1) Complete SXG Slide Catch Upgrade Assembly with Green Internal Rubber Shock Damper, Packed inside Original Branded Factory Sealed Protective Box Packaging.
*Administrative Armorer Staging, Caliber Fitment & Magazine Compliance Guidance: The Sig Sauer 8901520 SXG is a non-serialized metal housing upgrade block. **CRUCIAL PLATFORM FITMENT WARNING:** This frame is engineered strictly for 9mm Luger, .40 S&W, and .357 SIG non-manual safety Fire Control Units (FCUs); it is 100% INCOMPATIBLE with large-frame .45 ACP or 10mm Auto trigger units, nor will it clear manual safety layouts without specialized mill modification scripts**. **MAGAZINE INTERFACE ALIGNMENT RULE:** When the premium stainless steel magwell funnel is active on this frame, **this grip module strictly requires modern-pattern 17-round, 21-round, or 30-round Sig factory magazines featuring the circular Sig logo and square basepad locking tabs**. Legacy magazines stamped with standard "SIG SAUER" text and round floorplate tabs feature prominent side ears that will hit the magwell mouth, completely blocking chamber lockup until you replace or tune their baseplates. Ensure your firearm is thoroughly unloaded, cleared of active cartridges, and verified safe on your bench deck before initiating an FCU transfer.
Key Features
- Solid 22oz Stainless Steel Billet: Monolithic metal frame adds a massive 22 ounces of stabilizing ballast to permanently eliminate frame flex and soften impulse flip metrics.
- Premium LOK Grips® G10 Panels: Equipped out of the box with custom-milled LOK Grips G10 side plates and an integrated backstrap hosting aggressive, low-slip reverse checkering.
- Removable Stainless Steel Magwell: Incorporates a heavily beveled stainless funnel at the handle base to create an oversized guide path for flawless high-speed tournament reloads.
- Innovative SXG Shock Damper Pin: Accompanied by an up-armored SXG slide catch kit featuring a green rubber damper insert to isolate structural vibrations and protect action parts.
- Corrosion-Resistant Nitron Finish: Underlying stainless steel block is bathed in a rugged, matte black Nitron hard coat to ward off holster wear, weather rust, and chemical cleaners.
- Universal Full-Size Slide Fitment: Engineered natively to provide a flush, co-linear tracking lane for full-size (4.7-inch barrel) and XFIVE match slide assemblies.
Product Specifications
- Brand: Sig Sauer® (Precision engineered, machined, and competition vetted natively in the USA)
- Product Line: Custom Works Elite Performance Systems & Small Arms Metal Framing Series
- Model Series Designation: P320 Full-Size SXG Stainless Steel Grip Module Kit
- SKU / MPN: 8901520 (Alternative Industry Identifiers: 8901520-SIG / GRIP-320-F-SXG-BLK)
- Internal Chassis Compatibility: Fits Standard Sig Sauer P320 9mm / .40 S&W / .357 SIG Fire Control Units (**NO MANUAL SAFETY**)
- Slide Assembly Fitment Class: Engineered to mount XFIVE, Full-Size (4.7" Barrel), and Custom Extended Length Slides
- Frame Silhouette Size: Full-Size Standard Target Setup
- Chassis Monolithic Metallurgy: Monolithic CNC-Machined High-Tensile Stainless Steel Structural Billet
- Surface Protection Finishing: High-Durability Chemical-Resistant Matte Black Nitron Coating
- Grip Panels Material Class: Authentic LOK Grips® G10 Fiberglass Composite (Matte Black Reverse Checkering Finish)
- Dust Cover Rail System: Full-Length 5-Slot MIL-STD 1913 Picatinny Rail Interface Track
- Magazine Pipeline Compatibility: Modern Sig Sauer 17-Round and 21-Round Magazines with Square Basepad Tabs Only
- Magazine Catch Interface: Includes Factory-Installed Reversible Extended Matte Black Magazine Release Button
- Mechanical Installation Class: Toolless Drop-In Plug-and-Play Fire Control Unit Housing Swap
- Product Net Component Weight: ~22.00 oz Bare Steel Frame // ~24.50 oz (~1.53 lbs) Fully Dressed with G10 and Magwell
- Total Packaging Shipping Mass: ~2.15 lbs (Enclosed Inside Heavy Padded Custom Works Rigid Retail Presentation Boxing)