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Beretta Mx4 Storm

Submachine Gun (SMG) [ 2003 ]

The Beretta Mx4 Storm is an all-modern submachine gun firing the ubiquitous 9x19mm Parabellum pistol cartridge.

Authored By: Staff Writer | Last Edited: 12/21/2020 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

The Italian firearms concern of Beretta holds a long-running storied line dating back to 1526 - making it one of the oldest active gun makers anywhere in the world. The company struck gold with semi-automatic sidearms in the early part of the 1900s and delved into the submachine gun market thereafter. Today, the company is still renowned for its craftsmanship and has managed to stay with the times in releasing models appropriate to market needs. One of its more recent automatic weapons creations is the Mx4 "Storm" submachine gun which follows in the Storm line of weapons that includes the civilian-minded Cx4 carbine (based on the militarized Mx4) and Px4 semi-automatic pistol.

The Mx4 is a no-frills modern automatic weapon utilizing a straight blowback action and typically chambered for the 9x19mm Parabellum German pistol cartridge (another model chambers .45 ACP). Feeding is by way of a 30-round detachable box magazine (or pistol magazine if needed) and sighting through a two-position aperture sight arrangement. Effective ranges reach out to 200 meters with a muzzle velocity of 1,280 feet per second. Its outward design is such to promote fine elegant lines yet still maintain a useful, compact profile fitting well in the hands. Picatinny rail sections add a tactical value to the gun and are a staple of modern firearms, allowing the operator to customize his system with various optics, aimers, grips, bipods, and the like to suit the mission need. The trigger group is enclosed in a thick, solid ring and the buttstock integrated into the plastic body of the weapon with a cutout aft of the pistol grip area.

Overall weight reaches 2.5 kilograms with a length of 647mm and a barrel length of 312mm.

To date (2015), the Mx4 has been ordered by the governments of India (Border Guard), Italy (Navy), Libya, Portugal, and Venezuela (National Guard). In practice the weapon has already earned the trust of various government forces around the world through its accuracy, compactness, and reliability - a feat considering the glut of submachine gun options available to any one customer.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.


Service Year

Italy national flag graphic


Submachine Gun (SMG)

National flag of India National flag of Italy National flag of Libya National flag of Venezuela India; Italy; Libya; Venezuela
(OPERATORS list includes past, present, and future operators when applicable)

Overall Length
647 mm
25.47 in
Barrel Length
312 mm
12.28 in
Empty Wgt
5.47 lb
2.48 kg

Iron Front and Rear; Optional Optics.


Straight Blowback; Select-Fire

Blowback Operation
Gas pressure from the rearward movement of the ignited cartridge case provides the needed bolt movement, ejecting the spent case and stripping a fresh case from the magazine.
(Material presented above is for historical and entertainment value and should not be construed as usable for hardware restoration, maintenance, or general operation - always consult official manufacturer sources for such information)


9x19mm Parabellum; .45 ACP

Sample Visuals**

Graphical image of a 9mm pistol cartridge
Rounds / Feed

30-Round Detachable Box Magazine
Cartridge relative size chart
*May not represent an exhuastive list; calibers are model-specific dependent, always consult official manufacturer sources.
**Graphics not to actual size; not all cartridges may be represented visually; graphics intended for general reference only.
Max Eff.Range
328 ft
(100 m | 109 yd)
Muzzle Velocity
1,280 ft/sec
(390 m/sec)

Mx4 Storm - Base Series Designation

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Images Gallery

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Image of the Beretta Mx4 Storm
Image from Beretta marketing material.

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