The SIG SAUER P320-Five SXG is a striker-fired 9mm pistol built around the P320 modular platform, with a full-size 5" barrel and a stainless steel frame and slide. It ships with three 10-round steel magazines and arrives optics-ready. 
 

Key Specifications 

• Manufacturer: SIG SAUER 
• Family: P320 Series 
• Model: P320-Five SXG 
• Type: Semi-Auto Pistol 
• Action: Striker Fired 
• Caliber/Gauge: 9mm 
• Barrel Length: 5" 
• Overall Length: 8.5" 
• Capacity: 10 + 1 rounds 
• Number of Magazines: 3 (10 rd. Steel Mags) 
• Weight: 49.5 oz. 
   

Features 

The stainless steel slide and frame give this pistol its 49.5 oz. unloaded weight — heavy for a 9mm, but that mass dampens recoil and helps the gun track back to target quickly during fast strings. The SXG grip is the stainless steel X-Grip module, which is a P320-specific grip frame designed for feel and control rather than a standard polymer module. Adjustable rear sights let you dial in your zero for different loads or distances. The optics-ready cut accepts red dot mounting directly. A single-slot accessory rail runs under the dust cover for lights or lasers. 
 

Usage 

At 49.5 oz. and 8.5" overall with a 5" barrel, this is a competition and range pistol, not a carry gun. The weight and barrel length suit USPSA Production or Open divisions and precision pistol work. The modular P320 design means the serialized FCU can be moved between grip frames and slides as SIG releases new configurations.

The P320-Five SXG 9mm generates mostly positive feedback with a few consistent points of friction.

The modular P320 platform is consistently praised. Owners appreciate being able to swap grip frames, slides, and calibers using the same FCU. The optics-ready cut is straightforward to use, and most find mounting a red dot requires no machining or adapter plates.

Ergonomics get high marks. The SXG stainless grip module fits most hand sizes well, and the overall handling during extended range sessions is described as comfortable.

Accuracy is rated well across the board. Owners report solid performance at both short and longer ranges, which matches the 5" barrel's longer sight radius and the adjustable sights' precision.

The weight at 49.5 oz. is the most-cited downside. For competitive shooting it's manageable, but it rules this model out as a carry option for most people. The weight comes up frequently when buyers are comparing the Five to lighter P320 variants.

Trigger feel is mixed — most owners are satisfied, but some find the reset or pull weight less to their preference compared to other striker-fired pistols. This is a personal preference issue more than a defect.

Price runs higher than some competitors at the same barrel length, which leads some buyers to compare it carefully against other competition-oriented 9mm pistols before purchasing. Learning to aim through an optic also comes up as an adjustment for buyers new to pistol red dots.