I have the CX-4 Storm in .40cal, with the longer barrel at 18.5” (Canada has a barrel length law, normal barrel is about 16”) the 165gr .40cal round is moving at the same M/v as 165gr .44mag out of a 5” barrel. There is almost no muzzle flash and sound is quieter. With a vertical foregrip you can shoot from zero to 200m with good accuracy. The forward rails allows you to mount light and laser, improving your ability to find, identify and select targets. The laser lets you fire from the hip as well. If you carry a Berretta 92 pistols you can share mags between guns and if you run out bullets or have a jam, you can use it as a club. Using the laser from the hip, my wife can easily hit a target out to 15’ Since she hates to practice, this gives her a good self defence firearm for when I am away. Bonus for Canadians is that it gives us a centrefire rifle with a 10rd mag.