SIG P320 XTEN 5” Optics Ready 10mm Pistol, Black – 320X5-10-BXR3-R2
Introduction
When power meets precision and design aligns with durability, you get the SIG P320 XTEN 5” Optics Ready 10mm Pistol (320X5-10-BXR3-R2). Engineered for serious shooters who demand nothing but excellence, this full-sized, striker-fired pistol is purpose-built to harness the strength of the 10mm Auto cartridge. Whether you’re seeking a top-tier sidearm for backcountry defense, personal protection, competition, or duty use, the P320 XTEN delivers unrivaled performance in every scenario.
In this comprehensive review and SEO-rich product description, we will delve deep into what makes the SIG P320 XTEN a top-tier choice for professionals, enthusiasts, and tactical operators alike.
Table of Contents
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Product Overview
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Key Features
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Technical Specifications
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In-Depth Review
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Benefits of the 10mm Auto Cartridge
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Use Cases and Application Scenarios
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Comparison With Other Models
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Optics Compatibility and Modularity
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Build Quality and Durability
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Trigger Performance and Shooting Experience
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Safety Features
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Ergonomics and Handling
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Field Testing Results
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What Comes in the Box
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Customer Reviews and Testimonials
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Pros and Cons
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Maintenance Tips
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Why Buy From Us
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Frequently Asked Questions (FAQ)
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Final Thoughts
1. Product Overview
The SIG Sauer P320 XTEN 5” Optics Ready 10mm Pistol is part of the acclaimed P320 family, known for its modularity, rugged construction, and reliability under stress. What sets the XTEN model apart is its purpose-driven design for the high-pressure 10mm Auto round, making it ideal for both self-defense and outdoor applications such as hunting or protection against large predators.
2. Key Features
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Chambered in 10mm Auto – Greater power and penetration than 9mm or .45 ACP
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5-inch Carbon Steel Barrel – Enhanced accuracy and ballistic performance
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Optics-Ready Slide (R2 footprint) – Ready for red dot sights such as the ROMEO2 or Trijicon RMR
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XSeries Grip Module – Full-size, ergonomic, and stippled for superior control
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XSeries Flat-Faced Trigger – Crisp break with a short reset
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Fully Ambidextrous Controls – Suited for both left and right-handed shooters
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Modular Fire Control Unit (FCU) – Swappable between frames and calibers
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Steel Guide Rod and Improved Recoil System – Handles 10mm recoil effortlessly
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Black Nitron Finish – Corrosion-resistant and tactically discreet
4. In-Depth Review
The P320 XTEN strikes a balance between size and performance. Unlike compact 10mm pistols that are punishing to shoot, the XTEN provides a stable, full-size platform that absorbs recoil and allows fast follow-up shots. The extended barrel maximizes velocity and ensures consistent accuracy—perfect for long-range target shooting or defense in remote terrain.
The gun’s refined trigger and optics-ready slide elevate it to competition-ready standards. SIG’s attention to detail is evident in the overall build quality, with tight tolerances, smooth slide cycling, and ergonomic controls.
5. Benefits of the 10mm Auto Cartridge
The resurgence of the 10mm Auto is no accident. Its ballistic superiority makes it a go-to choice for:
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Wilderness Defense – Superior penetration against large game and threats
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Law Enforcement/Military – More stopping power than standard duty calibers
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Concealed Carry (for experienced users) – Compact power when concealment isn’t a top priority
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Hunting – Capable of ethically taking medium-sized game
Compared to .45 ACP and 9mm, the 10mm offers a flatter trajectory and higher energy levels.
6. Use Cases and Application Scenarios
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Wilderness Carry: Protect yourself from wildlife like bears and boars
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Home Defense: Maximum stopping power with a generous magazine
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Tactical Operations: Adaptable with optics, lights, and extended mags
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Range and Competition Shooting: Precision from the 5” barrel and low muzzle flip
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Law Enforcement: Duty-capable, reliable in adverse conditions
8. Optics Compatibility and Modularity
The P320 XTEN is factory cut for the SIG ROMEO2 and Trijicon RMR with the R2 footprint. It supports:
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Red dot mounting without slide milling
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Easy co-witness with suppressor-height iron sights
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Seamless integration with tactical accessories
Modularity means you can swap the FCU into a different size grip or caliber—something most pistols can’t do.
9. Build Quality and Durability
Crafted with a stainless steel slide and carbon steel barrel, the XTEN is built for rough conditions. The Nitron coating resists wear, corrosion, and moisture exposure. The recoil spring and guide rod are reinforced to withstand high-powered 10mm loads without sacrificing longevity.
10. Trigger Performance and Shooting Experience
The XSeries flat-faced trigger is a game-changer. It promotes consistent finger placement and enhances trigger control. It breaks cleanly at around 5.5 pounds with a tactile, audible reset—ideal for both defense and precision shooting.
11. Safety Features
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Internal Safety Mechanisms – Drop safety, striker safety
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No External Manual Safety – Clean, fast draw under pressure
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Trigger Safety – Prevents unintended discharge
12. Ergonomics and Handling
The XSeries grip is sculpted for comfort. With high undercut trigger guard and aggressive texturing, it offers:
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Natural pointability
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Firm, slip-free grip
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Reduced felt recoil
The beavertail prevents slide bite, and controls are easily accessible even for gloved hands.
13. Field Testing Results
In field conditions—from humid forests to dry desert sand—the XTEN proved itself reliable and consistent. It cycled various brands of 10mm ammunition flawlessly, from hollow points to FMJ, including hard cast rounds for bear defense.
14. What Comes in the Box
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SIG P320 XTEN Pistol
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Two (2) 15-round 10mm Magazines
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Owner’s Manual
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Cable Lock
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SIG Branded Hard Case
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Optics Mounting Screws and Plates
16. Pros and Cons
Pros:
✔ Full-size stability for 10mm recoil
✔ Optics ready with R2 cut
✔ Flat trigger with clean break
✔ High-capacity 15-round magazines
✔ Modular FCU platform
Cons:
✘ Slightly heavy for concealed carry
✘ Recoil may be too much for beginners
✘ Limited holster compatibility (special fit required for XTEN frame)
17. Maintenance Tips
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Clean the barrel and slide after every range session with quality CLP
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Lubricate the slide rails and locking surfaces
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Inspect magazines for debris or spring fatigue
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Use a soft brush to clean around the striker and breech face
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Store in a dry environment with a desiccant
18. Why Buy From Us
✅ 100% authentic SIG Sauer products
✅ Fast and insured shipping
✅ Competitive pricing and exclusive deals
✅ Expert support and customer service
✅ Warranty assistance and returns policy
19. Frequently Asked Questions (FAQ)
Q: Can the XTEN shoot .40 S&W ammo?
A: No. Although dimensionally similar, .40 S&W is not safe or suitable for the XTEN’s chamber. Use only 10mm Auto.
Q: Is it red dot ready?
A: Yes. It features the R2 footprint, compatible with SIG ROMEO2, Leupold DPP, and Trijicon RMR optics.
Q: Is this pistol good for bear country?
A: Absolutely. With proper hard-cast 10mm ammo, the P320 XTEN is an excellent backcountry defense tool.
20. Final Thoughts
The SIG P320 XTEN 5” Optics Ready 10mm Pistol (320X5-10-BXR3-R2) is more than just another striker-fired pistol—it’s a powerhouse. Blending modular design with raw 10mm strength and top-tier SIG quality, it serves a wide spectrum of shooters: hunters, tactical professionals, competitive marksmen, and self-defense advocates.
If you’re looking for a 10mm pistol that doesn’t compromise on capacity, accuracy, or optics compatibility, the XTEN is your next trusted companion. When your life depends on it—or when precision truly matters—choose the P320 XTEN.
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