The Sig Sauer P320 X-Five Max is a striker-fired semi-automatic pistol chambered in 9mm Luger. It holds 21+1 rounds and has a 5-inch carbon steel barrel. The frame is stainless steel; the slide is black Nitron stainless steel with an optic cut. Grips are gray TXG polymer. Weight is 43.50 oz (2.71 lbs). Safety feature is a striker block. 
 

Key Specifications 

• Brand: Sig Sauer 
• Model Name: P320 X-Five Max 
• Caliber: 9mm Luger 
• Capacity: 21+1 rounds 
• Barrel Length: 5 inches 
• Weight: 43.50 oz (2.71 lbs) 
• Frame Material: Stainless Steel 
• Slide Finish: Black Nitron with optic cut 
• Grips: Gray TXG Polymer 
• Safety Feature: Striker Block 
   

Features 

The striker fire action gives a consistent trigger pull shot to shot. The optic-cut slide accepts red dot sights without a separate adapter plate, which is a practical advantage for competition setups. The 21+1 capacity reduces reload frequency during extended strings. The 5-inch barrel adds sight radius and helps maintain muzzle velocity at longer distances. TXG polymer grips have good traction.

Owners of the P320 X-Five Max are generally positive about it, particularly for competition use. The ergonomics and grip comfort come up consistently: the TXG grips give solid control and the pistol balances well at 43.50 oz. The optic-ready capability is a notable selling point; owners appreciate being able to mount a red dot directly without extra hardware.

Accuracy and consistency are frequently praised, and the 21-round capacity is seen as a genuine advantage in competition shooting. On the negative side, the weight — nearly 2.75 lbs unloaded — makes it impractical for everyday carry, and most discussions acknowledge this is a competition or range gun rather than a carry pistol. Trigger feel gets mostly favorable reviews, though some shooters prefer a different reset or break weight. The frame size is sometimes noted as bulky for smaller hands.