Beretta has a great web section about the PX4 Storm, check it out here:

This is the civilian version, and includes 2 magazines.

• Category : Pistols
• Type : Pistol
• Action : Single/Double
• Caliber : 9mm
• Barrel Length : 4.0″
• Capacity : 10+1
• Safety : Ambidextrous Manual, Firing Pin
• Grips : Black Interchangeable Backstrap
• Sights : 3-Dot White
• Weight : 27.7 oz
• Frame Finish : Black