The PX4 Storm is Beretta's rotating-barrel polymer-frame full-size pistol. The unique rotating barrel system reduces felt recoil by eliminating the muzzle-dip of traditional Browning-tilting barrel designs. Available in 9mm, .40 S&W, and .45 ACP with a modular internal chassis. Type: Pistol Action: Semi-Auto Caliber: 9mm Luger Capacity: 17 Year introduced: 2004, Italy Weight: 27.7 oz Overall length: 7.6" Status: Active Intended use: Duty / Service, Law Enforcement, Home Defense