The Sig Sauer P320 XTEN is a full-size striker-fired pistol chambered in 10mm Auto with a 5-inch barrel. It ships with two 10-round magazines and is configured with an optic-ready slide and a manual safety. The frame is polymer with a black finish. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model: P320 XTEN 
• Caliber: 10mm Auto 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 5 inches 
• Color/Finish: Black 
   

Detailed Features 

• Full-size polymer frame 
• Optic-ready slide with XRAY-3 day/night sights 
• Manual safety included 
• Ships with two 10-round magazines 
• Striker-fired action

Owners of the P320 XTEN tend to highlight the platform's ergonomics and the practical choice of 10mm Auto for hunting backup or woods carry. The full-size frame absorbs recoil better than compact options in the same chambering, and most find the trigger reset predictable and consistent. The manual safety option divides opinion: some appreciate the added retention layer, while others see it as unnecessary on a striker-fired design.

The optic-ready cut is a genuine selling point. Shooters who run red dots report good co-witness options and a secure mount without adapter plates. The XRAY-3 iron sights work well as a backup. A recurring comment is that the slide serrations are aggressive enough to run the gun gloved.

Value discussions are mixed. The P320 XTEN sits at a premium price point, and a portion of buyers feel the 10mm-specific models command more of a markup than the platform justifies compared to the 9mm variants. Aftermarket support is strong for the P320 family overall, though 10mm-specific components are a narrower market.