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Sig Sauer® P320 XFIVE™ TXG 9mm Caliber X-Change Kit – Heavy Tungsten-Infused Polymer Grip Module – Optic-Ready Slide with 5" Match Bull Barrel – Dawson Precision® Fiber Optic Sights – (2) 17-Round Steel Magazines – Gray Finish – 8900269
Product Description
The Sig Sauer® P320 XFIVE™ TXG 9mm Caliber X-Change Kit (8900269) represents the absolute pinnacle of modular handgun engineering, competition-grade frame ballistics, and tactical component logistics, proudly designed and manufactured in Exeter, New Hampshire, USA. Engineered to unlock the latent modular versatility of Sig’s multi-patented standalone Fire Control Unit (FCU), this premium system gives owners the power to instantly overhaul an ordinary, lightweight P320 carry or compact configuration into a world-class match platform. While standard polymer handguns suffer from violent muzzle flip and snappy muzzle rise under high-speed strings of fire—prolonging your split-second target-reacquisition loops—the TXG layout systematically conquers these physical limitations. This heavy-duty system upgrade (798681632930) establishes an elite mechanical workspace to secure maximum flat-shooting stability across USPSA, IDPA, and tactical law enforcement training loops.
The core structural triumph of this premium transformation engine relies on Sig Sauer’s revolutionary, patent-pending TXG Tungsten-Infused Heavy Polymer Grip Module. By infusing dense tungsten powder directly into the liquid polymer matrix prior to precision molding, Sig’s engineers created a frame housing that delivers the heavy, dampening physical mass of steel paired with the flexible structural elasticity of an advanced composite. Grounded in a signature legion gray finish, this frame handles intense cyclic vibration effortlessly, reducing felt muzzle flip by up to 50%. The kit arrives fully kitted with an overbuilt **5.0-inch match-grade carbon steel bull barrel and a solid steel guide rod running a 14lb 1911-style recoil spring** (plus an extra 12lb spring for custom ammunition tuning), driving the slide flatly forward to preserve absolute tracking uniformity.
The true technical victory of this American-engineered masterclass lies within its **ROMEO1PRO optic-ready slide architecture and match-grade sighting deck**. The slide features an integrated optics footprint beneath a removable top plate, cut precisely to receive high-performance reflex sights like the ROMEO1PRO, ROMEO2, or Leupold® DeltaPoint Pro without requiring custom milling scripts. For traditional iron sight configurations, the slide is pre-fit with a Dawson Precision® fully adjustable fiber optic front sight and an R2 adjustable rear sight matrix. Outfitted with a removable flared aluminum magazine funnel and an internal plug weight hidden within the magwell frame, this 3.55-pound complete conversion kit yields absolute administrative and mechanical authority over your competitive shooting workspace.
Includes: (1) Authentic Sig Sauer P320 XFIVE Optic-Ready Slide Assembly (Legion Gray Finish, 5" Match Bull Barrel, Solid Steel Guide Rod, 14lb Recoil Spring installed), (1) Additional 12lb Tune-Up Recoil Spring, (1) Full-Size TXG Tungsten-Infused Grip Module with Pre-Installed Flared Aluminum Magwell and Internal Balance Weight, (2) 17-Round Premium Steel 9mm Magazines, packed inside an Original Branded Factory Sealed Protection Box.
*Administrative Installation, Magazine Compliance & Operational Safety Guidance: The Sig Sauer 8900269 Caliber X-Change kit is a stripped conversion module; it **does NOT include the internal chassis Fire Control Unit (FCU)**, requiring you to drop in your own existing non-manual safety P320 trigger group to finalize a functional firearm. **CRUCIAL MAGAZINE AND FRAME WARNING:** This conversion system is designed strictly for **non-manual safety FCU configurations and is incompatible with manual-safety safety groups unless the grip module receives custom modifications**. Due to the precise contours of the extended flared competition magwell funnel, standard factory 17-round magazines with thick plastic baseplates may require replacement slim metal basepads to click cleanly past the throat guard. Always explicitly verify your source handgun's chamber is completely unloaded, cleared, and safe before executing an FCU swap on your armorer bench.
Key Features
- Revolutionary TXG Tungsten Polymer: Premium heavy polymer matrix uses blended tungsten powder to match the weight of a steel frame while cutting recoil flip by up to 50%.
- 5" Match-Grade Bull Barrel: Substantial 5.0-inch carbon steel bull barrel adds forward balancing mass and tightens mechanical lockup tolerances for surgical long-range accuracy.
- Optic-Ready Slide Formatting: Pre-cut slide deck drops comfortably under low-profile covers, hosting the ROMEO1PRO, ROMEO2, and DPP footprints without adaptation plates.
- Dawson Precision Sighting Array: Outfitted with a high-contrast adjustable fiber optic front blade and a fine-line serrated rear sight block to provide crisp target definition.
- Dual-Spring 1911 Recoil Architecture: Uses a solid steel guide rod accepting standard 1911 recoil springs; ships with 14lb and 12lb options to easily match your soft competition reloads.
- Flared Magwell & Grip Weights: Arrives factory-loaded with a detachable aluminum magazine funnel and an internal backstrap slug to optimize reloads and fine-tune your center of mass.
Product Specifications
- Brand: Sig Sauer® (Precision engineered, molded, and multi-stage batch tested natively in the USA)
- Product Line: High-Performance Competition Component Upgrades & Caliber X-Change Modular Kits
- Model Series Designation: P320 XFIVE TXG 9mm Caliber Exchange Kit
- SKU / MPN: 8900269 (Alternative Industry Identifiers: 8900269-Sig / SIG8900269 / UT-8900269)
- Internal Chassis Compatibility: Fits Standard Sig P320 9mm/.40/.357 Fire Control Units (**NO MANUAL SAFETY ONLY**)
- Caliber System Optimization: 9x19mm Parabellum / 9mm Luger Baseline
- Barrel Length Profile: 5.0 Inches (127 mm) Heavy Machined Bull Barrel
- Slide Machining Pattern: XFIVE Series Optic-Ready Profile featuring Aggressive Front cocking Serrations
- Optic Cut Footprint Direct Mounting: ROMEO1PRO, ROMEO2, Leupold DeltaPoint Pro
- Grip Module Framing Class: Full-Size XSeries TXG (Tungsten Infused Heavy Composite Composition)
- Grip Finish Hue: Distinctive Matte Legion Gray Coloration Profile
- Sighting Hardware Standards: Dawson Precision Adjustable Fiber Optic Front / R2 Adjustable Rear Target Block
- Recoil Control Infrastructure: Solid Carbon Steel Full-Length Guide Rod with 14lb and 12lb Springs
- Magazine Extension Base: Removable Flared Aircraft Aluminum Magwell Extension Funnel
- Magazine Included Configuration: (2) Two 17-Round Premium Polished Steel Body Magazines
- Product Net Component Weight: ~2.65 lbs (~42.4 oz) Combined Bare Slide, Barrel, Mags, and Grip Assembly
- Total Packaging Shipping Mass: ~3.55 lbs (Enclosed Inside Heavy Padded Protective Factory Utility Boxing)
- UPC Barcode Number: 798681632930
