Unlock Unprecedented Versatility: The Sig Sauer P320 Full-Size X-Change Kit in .357 SIG

Are you a Sig Sauer P320 owner looking to dramatically expand the capabilities of your existing handgun? Do you want the flexibility to adapt your firearm for different shooting disciplines, personal preferences, or even explore new calibers without purchasing an entirely new weapon? The Sig Sauer CALX320F357BSS P320 Full Size X-Change Kit is engineered precisely for this purpose, offering a seamless and intelligent upgrade path for your modular P320 firearm.

This comprehensive kit transforms your Sig P320, allowing you to convert your current setup into a full-size .357 SIG handgun with remarkable ease. It represents the pinnacle of Sig Sauer's innovative modular pistol design, empowering shooters to customize their P320's configuration, feel, and performance by simply swapping out key components around the serialized fire control unit (FCU). This particular X-Change Kit, identified by UPC 798681511495, is specifically tailored for those who value the potent .357 SIG cartridge and desire a full-size platform for enhanced control and accuracy.

What Problem Does the P320 X-Change Kit Solve for Shooters?

For many firearm enthusiasts, the desire to experiment with different calibers, improve ergonomics, or adapt a handgun for various roles (e.g., range training, competitive shooting, home defense, or even certain hunting applications) often means investing in multiple complete firearms. This can be a costly and space-consuming endeavor. The Sig Sauer P320 X-Change system fundamentally changes this paradigm.

The CALX320F357BSS kit addresses several key needs:

• Caliber Conversion: Easily switch from your current P320 caliber (e.g., 9mm, .40 S&W) to the powerful .357 SIG, expanding your shooting versatility.
• Ergonomic Customization: Experience the benefits of a full-size polymer grip module, which often provides a more substantial and stable grip, aiding in recoil management and natural point of aim.
• Role Adaptability: Transition your P320 into a full-size firearm suitable for duty use, competition, or simply enjoying a larger, more stable shooting platform at the range.
• Cost-Effectiveness: Instead of buying a new firearm for each caliber or configuration, you invest in a single, serialized P320 FCU and acquire X-Change kits, saving money and simplifying ownership.
• Enhanced Performance: The full-size slide and barrel contribute to a longer sight radius, potentially improving accuracy, and the increased mass can help mitigate felt recoil from the potent .357 SIG round.
• Optic Readiness: The included slide is designed to be reflex optic compatible, allowing for the direct mounting of popular red dot sights, a crucial feature for modern shooting preferences and competitive advantages.

What's Included in Your Sig Sauer P320 Full-Size X-Change Kit?

This comprehensive kit, specifically the CALX320F357BSS model, provides all the necessary components (excluding the serialized fire control unit) to convert your P320 into a full-size handgun chambered in .357 SIG. When you unbox this kit, available at DEGuns, you'll find:

• Complete Full-Size Slide: This is a finished slide, ready for use, and notably features a crucial cut for direct mounting of reflex optics. This means you can attach popular red dot sights without needing additional machining or adapter plates, streamlining your setup for faster target acquisition and improved accuracy. The slide boasts a durable black finish.
• Full-Size .357 SIG Barrel: Precision-machined for optimal accuracy and reliability with the .357 SIG cartridge, this barrel is specifically designed for the full-size slide.
• Recoil Spring Assembly: A complete recoil spring guide rod and spring designed to manage the recoil characteristics of the full-size .357 SIG configuration, ensuring smooth operation and longevity.
• Full-Size Polymer Grip Module: This ergonomic, black polymer grip module provides a comfortable and secure hold, typical of a full-size handgun. Its design contributes significantly to overall firearm control and shootability, particularly with a potent cartridge like the .357 SIG.
• Magazine: A dedicated magazine specifically for the .357 SIG caliber, designed to fit the full-size grip module and ensure reliable feeding. Capacity will typically align with standard full-size P320 magazines, usually 17 rounds for the .357 SIG.

Important Note on Compatibility: This P320 X-Change Kit is not compatible with P320 models that feature a manual safety. The grip module and slide are designed for the non-manual safety variants of the P320 FCU. Ensure your existing P320 fire control unit does not have a manual safety lever before purchasing this kit to guarantee seamless compatibility.

Exploring the .357 SIG Caliber: Why Choose This Potent Round?

The .357 SIG caliber is an intriguing and powerful cartridge, often chosen by professionals and enthusiasts for its high velocity and flat trajectory. Developed by Sig Sauer in collaboration with Federal Cartridge, it's essentially a .40 S&W case necked down to accept a 9mm (0.355-inch) bullet. This design allows it to achieve velocities comparable to the legendary .357 Magnum revolver cartridge, but from a semi-automatic pistol.

Key characteristics and benefits of the .357 SIG:

• High Velocity: One of its most defining traits, leading to excellent terminal ballistics and reduced bullet drop over common pistol engagement distances.
• Flat Trajectory: The high velocity results in a flatter trajectory compared to 9mm or .40 S&W, which can aid in precision shooting.
• Reliable Expansion: The energy and velocity typically ensure reliable expansion of hollow-point projectiles, crucial for self-defense or duty applications.
• Penetration: Offers superior penetration compared to 9mm or .40 S&W against certain barriers, which can be a factor for law enforcement or defensive scenarios.
• Distinct Recoil Impulse: Shooters often describe the recoil of .357 SIG as a sharper, snappier push compared to the broader shove of a .40 S&W, but manageable, especially in a full-size platform.
• Professional Preference: The .357 SIG has seen adoption by various law enforcement agencies due to its performance characteristics.

For those who prioritize performance and the unique ballistic advantages of a high-velocity pistol cartridge, converting your P320 to .357 SIG with the CALX320F357BSS kit is an excellent choice.

The Modular P320 Advantage: How it Works

The core of the P320's innovation lies in its serialized Fire Control Unit (FCU). Unlike most traditional firearms where the frame or receiver is the serialized component, the P320's FCU contains all the critical fire control components and is the actual "firearm" in the eyes of the law. This ingenious design allows you to:

1. Remove the FCU: A simple field strip process allows you to remove the FCU from your current P320 grip module.
2. Insert into New Kit: Drop the FCU into the new CALX320F357BSS full-size grip module.
3. Attach Slide Assembly: Attach the new full-size .357 SIG slide assembly.
4. Load Magazine: Insert the new .357 SIG magazine.

And just like that, you have a completely transformed P320. This modularity means you can switch between calibers (e.g., 9mm, .40 S&W, .357 SIG, .45 ACP with specific kits), frame sizes (compact, carry, full-size, subcompact), and grip types (standard, X-Series, Legion) using the same serialized FCU. This system provides unparalleled customization and longevity for your firearm investment.

Optimizing Your Full-Size P320: Reflex Optic Readiness

The CALX320F357BSS kit includes a slide that is specifically designed to be reflex optic compatible. This is a significant feature for modern shooters who recognize the benefits of red dot sights on pistols.

Why add a reflex optic to your P320?

• Faster Target Acquisition: Red dot sights allow for quicker sight alignment and target acquisition compared to traditional iron sights, as you only need to focus on one plane (the dot on the target).
• Improved Accuracy: Many shooters find it easier to achieve greater precision, especially at longer distances, with a red dot.
• Low Light Performance: Red dots excel in low-light conditions where iron sights can be difficult to see.
• Situational Awareness: With a red dot, you can maintain focus on the target while placing the reticle, improving overall situational awareness.
• Reduced Vision Strain: For shooters with aging eyes or vision impairments, a red dot can make shooting much more comfortable and effective.

The integrated optic cut on the CALX320F357BSS slide ensures a secure and low-profile mounting solution for your preferred red dot sight, making it a truly modern and versatile setup for any shooting scenario.

Who Can Benefit from This P320 Full-Size X-Change Kit?

This particular X-Change Kit is an ideal acquisition for a wide range of Sig P320 owners, including:

• Enthusiasts Seeking Caliber Diversification: If you already own a P320 in 9mm or .40 S&W and want to experience the unique ballistic performance of the .357 SIG without buying a new gun.
• Competitive Shooters: The full-size platform provides a stable base, and the optic-ready slide allows for a competitive advantage in disciplines like USPSA or IDPA.
• Law Enforcement or Security Professionals: For those who carry a P320 and desire the power and penetration capabilities of the .357 SIG round in a duty-ready, full-size configuration.
• Home Defense Enthusiasts: A full-size handgun offers excellent recoil control and magazine capacity, making it a formidable tool for home protection.
• Shooters Prioritizing Ergonomics: If you prefer the substantial feel and improved grip provided by a full-size frame.
• Anyone Looking to Maximize Their P320 Investment: By leveraging the P320's modularity, you can adapt your single FCU to numerous configurations over time.

Installation and Maintenance of Your P320 X-Change Kit

Converting your P320 with the CALX320F357BSS kit is remarkably simple and requires no specialized tools. The process is designed to be user-friendly, allowing you to switch between configurations in minutes.

Installation Steps (General Overview):

1. Ensure Safety: Always ensure your firearm is unloaded and safe before beginning any work. Remove the magazine and visually and physically check the chamber.
2. Disassemble Current P320: Field strip your existing P320 to remove the slide assembly, recoil spring, barrel, and the fire control unit (FCU) from its grip module.
3. Insert FCU: Place your P320 FCU into the new CALX320F357BSS full-size polymer grip module. It should snap securely into place.
4. Assemble New Slide: Insert the .357 SIG barrel into the new full-size slide. Then, insert the recoil spring assembly.
5. Attach Slide to Grip Module: Align the new slide assembly with the rails on the grip module and slide it on, locking it in place.
6. Function Check: Perform a thorough function check to ensure all components are properly installed and operating as expected.

Maintenance for your X-Change Kit components is similar to any other firearm. Regular cleaning of the barrel, slide, and recoil spring assembly is essential to ensure reliable operation and longevity. Lubricate moving parts as recommended by Sig Sauer to reduce wear.

Trust in Sig Sauer Quality: A Legacy of Innovation

Sig Sauer is renowned globally for its commitment to engineering excellence, precision manufacturing, and unwavering reliability. The P320 platform itself is a testament to this, having been adopted by various military and law enforcement agencies worldwide, including the U.S. Army as its official sidearm (M17/M18).

When you choose a Sig Sauer X-Change Kit like the CALX320F357BSS, you're investing in:

• Precision Engineering: Components are manufactured to exacting tolerances, ensuring perfect fit and reliable function.
• Durable Materials: High-quality steel for the slide and barrel, and robust polymer for the grip module, designed to withstand rigorous use.
• Proven Performance: Backed by Sig Sauer's reputation for producing firearms that perform consistently in demanding environments.
• Innovation: The modular design of the P320 system is a pioneering feature that continues to set industry standards.

Whether you're enhancing an existing P320 or building a new configuration around a standalone FCU, this X-Change Kit delivers the performance and quality expected from Sig Sauer.

Where to Find Your Sig Sauer P320 Full-Size X-Change Kit?

The Sig Sauer CALX320F357BSS P320 Full Size X-Change Kit in .357 SIG is a highly sought-after accessory for P320 owners. You can find this essential upgrade and other genuine Sig Sauer parts and accessories at DEGuns.com. As a reputable retailer, DEGuns offers a wide selection of firearms and firearm components, ensuring you receive authentic Sig Sauer products backed by reliable service. Look for the UPC 798681511495 to confirm you're getting the correct kit.

Enhance your P320, expand your capabilities, and experience the versatility of the Sig Sauer modular handgun system today.

Sig Sauer CALX320F357BSS P320 Full Size X-Change Kit Specifications

Attribute	Details
Brand	Sig Sauer
Series	Full Size X-Change Kit
Model	P320
Caliber	.357 Sig
Firearm Fit	Sig P320 Handgun
Color	Black
Hand	Right Hand (Universal Grip Module)
Firearm Type	Handgun (Conversion Kit)
Grip Type	Polymer Grip Module
SKU	CALX320F357BSS
MPN	CALX320F357BSS
UPC	798681511495