Beretta Cx4 Storm

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Cx4 Storm
The Cx4 Storm
Place of originItaly
Service history
Used bySee Users
Production history
Mass2.575 kg (5.68 lb)
Length755 mm (29.7 in)
Barrel length422.5 mm (16.6 in)
Width63 mm (2.5 in)
Height190 mm (7.5 in)

Cartridge9×19mm Parabellum
9×21mm IMI
.40 S&W
.45 ACP
Muzzle velocity9×19mm NATO 1400 FPS
Feed system8-, 10-, 11-, 14-, 15-, 17-, 20-, or 30-round box magazine
SightsRear: 2-position aperture flip sight; front: adjustable post
327 mm (12.9 in) sight radius

The Beretta Cx4 Storm is a pistol-caliber semi-automatic carbine aimed at the sporting, personal defense, and law enforcement markets. It is available in two models: one that accepts 92/96 magazines, and one that accepts Px4 series magazines, each available in 9×19mm Parabellum, .40 S&W, .45 ACP, and 9×21mm.

The Beretta Mx4 Storm is an automatic version of the Cx4 Storm.[1]

Design details[edit]

The Cx4 Storm was developed to be used in conjunction with Beretta semi-automatic pistols. For example, the magazines for the Beretta 92FS chambered in 9mm can be used in the Cx4 (also chambered in 9mm).

Conversion between Px4 Storm, 92/96 and 8000/8040 Cougar 9×19mm Parabellum/.40 S&W magazines requires two parts (not included with rifle). For Px4 magazines the C5C620 magazine insert and C89210 magazine release button are required, for 92/96 the C5A511 insert and C89109 release, for Cougar the C5A670 insert and C89110 release.[2]

The CX4 Storm includes a Picatinny rail and tri-rail (bottom and side rails) for accessories. In addition, the Cx4 is partially ambidextrous. Left-handed shooters can switch the safety, cocking handle, ejection port, and magazine release to the left side of the firearm.

Use in crime and mass shootings[edit]

In Canada, the Cx4 Storm was the primary weapon used in the 2006 Dawson College shooting. The restricted class firearm had been acquired legally, and a coroner's inquest into the shooting recommended that all semi-automatic rifles be banned in Canada.[3][4] The Common Sense Firearms Licensing Act passed in 2015 did not include a provision for such a ban. Sales of the CX4 Storm increased in Canada following the shooting,[5] and in 2011, Beretta introduced a non-restricted (19" barrel) variant of the Cx4, making it more accessible.[6]


Mx4 Storm[edit]

Beretta Mx4 Storm
CX4 Sideview.png
TypeSubmachine gun
Place of origin Italy
Service history
Used bySee Users
Production history
Mass2.48 kg
Length647 mm
Barrel length312 mm

Cartridge9×19mm Parabellum
.45 ACP
ActionStraight Blowback
Muzzle velocity390 m/s
Effective firing range~200 m
Feed system30-round box magazine
Sights2 position aperture sight

The Beretta Mx4 Storm is the military version of the Cx4 Storm[14] pistol-caliber carbine. It has a barrel length of 12 inches, and is capable of automatic fire. The Mx4 can use pistol magazines, or its own 30-round magazine. There is an accessory rail on the top of the Mx4 for mounting scopes, laser aiming devices or flashlights. There is another rail underneath, forward of the trigger, for mounting vertical foregrips, laser aiming devices or flashlights.


  •  Djibouti: In service at least since 2016
  •  India: On February 14, 2011 an order for 34,377 carbines was placed by BSF (Border Security Force) personnel. The guns were delivered in two batches: The first batch of 17,000 was delivered in September 2011 and the second batch of 17,377 by March 30, 2012. In January 2012 BSF personnel found excess metal deposits, tool mark scratches, and corrosion in 2,374 carbines, and barrels of four carbines bulged when tested. On March 27, 2012 the Indian Home Ministry asked Beretta to replace 573 carbines. It blamed the defects in some of the other rifles due to improper cleaning and use of bad ammunition. Another order of 34,000 carbines was made. The total order of 68,377 Storm carbines amounts to Rs. 2504 crore (US$417.3 million).[15]
  •  Italy: In 2013, the Italian Navy (Comforsbarc) ordered 90 Beretta Mx4 Storms (for €58.606) to be delivered in 2014;[16] a second order was placed in 2017.[17]
  •  Colombia: Fuerza Aerea Colombiana since 2013[citation needed]
  •  Kenya: National Police Service since mid 2017[citation needed]


  1. ^ "MP5 Gets Replaced". 2011-03-07. Retrieved 2011-03-07.
  2. ^ "Converting magazine type in the CX4 Storm". Beretta USA Customer Help. Retrieved 20 January 2011.
  3. ^ "Dawson College killer's gun should be banned: coroner -". Retrieved 11 November 2014.
  4. ^ "Canadian ban on semiauto rifle sought - World news - Americas - NBC News". Retrieved 11 November 2014.
  5. ^ "Gunman's weapon of choice sees spike in popularity". Archived from the original on 2014-05-12. Retrieved 2012-09-07.
  6. ^ "10 years after Dawson shooting, killer's weapon is more accessible than in 2006". Retrieved 24 April 2019.
  7. ^ Opencontent. "L'Italia ha inviato 11mila Beretta semiautomatici al regime di Gheddafi". Retrieved 11 November 2014.
  8. ^ "Beretta arms New York agency". Shooting Industry. July 2007. Retrieved 2008-10-27.
  9. ^ O'Connell, Patrick M. (2008-05-30). "St. Louis police want more pistol firepower". St. Louis Post-Dispatch. Retrieved 2008-10-27.
  10. ^ Burgess, Laura (July 2008). "The College of William and Mary Police Choose the Beretta Cx4 Storm Carbine/Patrol Rifle". Beretta USA, Corp. Archived from the original on October 15, 2008. Retrieved 2008-10-27.
  11. ^ "Presidente Chávez juramentó a la Guardia del Pueblo para reforzar la lucha contra el crimen". Noticias24. Retrieved 11 November 2014.
  12. ^
  13. ^ Beretta CX4 Storm Carbine 9mm Semi-Auto, New - Manufactured by Beretta in Italy
  14. ^ "MP5 Gets Replaced". 2011-03-07. Retrieved 2011-03-07.
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  16. ^
  17. ^

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