The Beretta Cx4 Storm is a pistol

Pistol

When distinguished as a subset of handguns, a pistol is a handgun with a chamber that is integral with the barrel, as opposed to a revolver, wherein the chamber is separate from the barrel as a revolving cylinder. Typically, pistols have an effective range of about 100 feet.-History:The pistol...

-caliber carbine

Carbine

A carbine , from French carabine, is a longarm similar to but shorter than a rifle or musket. Many carbines are shortened versions of full rifles, firing the same ammunition at a lower velocity due to a shorter barrel length....

 aimed at the sporting, personal defense and law enforcement markets. Seven different models accept full-size Beretta

Beretta

Fabbrica d'Armi Pietro Beretta is an Italian firearms manufacturer. Their firearms are used worldwide for a variety of civilian, law enforcement, and military purposes. It is also known for manufacturing shooting clothes and accessories. Beretta is the oldest active firearms manufacturer in the...

 magazines from the 92/96

Beretta 92

The Beretta 92 is a series of semi-automatic pistols designed and manufactured by Beretta of Italy. The model 92 was designed in 1972 and production of many variants in different calibers continues today...

, Cougar

Beretta 8000

The Beretta 8000 series pistols are manufactured by Beretta of Italy.They first appeared on the market in 1994 as a more compact alternative to the full-sized Beretta 92 service pistol in order to offer a compromise between concealability, ease of carry, accuracy and firepower.It was originally...

, and Px4 series pistols in 9x21 IMI (its original caliber), 9x19mm Parabellum, .40 S&W

.40 S&W

The .40 S&W is a rimless pistol cartridge developed jointly by major American firearms manufacturers Winchester and Smith & Wesson. The .40 S&W was developed from the ground up as a law enforcement cartridge designed to duplicate performance of the FBI's reduced velocity 10mm cartridge which could...

 and .45 ACP

.45 ACP

The .45 ACP , also known as the .45 Auto by C.I.P., is a cartridge designed by John Browning in 1904, for use in his prototype Colt semi-automatic .45 pistol and eventually the M1911 pistol adopted by the United States Army in 1911.-Design and history:The U.S...

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The Beretta Cx4 Storm is the civilian version of the Beretta Mx4 Storm

Beretta Mx4 Storm

The Beretta Mx4 Storm is the military version of the Beretta Cx4 Storm pistol-caliber carbine....

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The Cx4 Storm was developed to be used in conjunction with Beretta

Beretta

Fabbrica d'Armi Pietro Beretta is an Italian firearms manufacturer. Their firearms are used worldwide for a variety of civilian, law enforcement, and military purposes. It is also known for manufacturing shooting clothes and accessories. Beretta is the oldest active firearms manufacturer in the...

 semi-automatic pistols.