The .45 ACP PX4 Storm provides the largest-caliber option in the PX4 family, retaining the rotating-barrel recoil attenuation system. 10+1 capacity due to .45 ACP cartridge dimensions. Offers one of the softest-shooting .45 ACP pistol platforms available. Type: Pistol Action: Semi-Auto Caliber: .45 ACP Capacity: 10 Year introduced: 2005, Italy Weight: 29 oz Overall length: 7.6" Status: Active Intended use: Duty / Service, Home Defense