Image credit
- Title
- File:Beretta-Cx4-Storm-p1030164.jpg
- Author
- Rama(attribution required)
- Licence
- CC BY-SA 2.0
- Source
- https://commons.wikimedia.org/wiki/File:Beretta-Cx4-Storm-p1030164.jpg
How Muzzle energy is calculated
E = ½ · m · v²
Inputs
- m7.452 g115.0 grverifiedsource115 gr as published, converted to grams.
- v359.7 m/s1,180 fpsverifiedMeasured with a 101.6 mm barrel, not this arm's 423 mm. Velocity outside the sourced range is not projected.
1 of 2 inputs link to their source.
How Muzzle velocity is calculated
nearest sourced barrel length, no extrapolation
Inputs
- v at 101.6 mm359.7 m/s1,180 fpsverifiedsource1180 fps as published.
Assumptions
- This figure belongs to a 101.6 mm barrel. It is shown because it is the closest measurement that exists, not because it applies here.
1 of 1 inputs link to their source.
How Loaded mass is calculated
m_loaded = m_empty + m_magazine + n · m_cartridge
Not calculated: m_magazine has no sourced figure yet. Nothing is substituted for a missing input.
Assumptions
- One magazine, filled to the stated capacity. Spare magazines, optics, slings and lights are the owner’s, not the arm’s.
No input on this calculation carries a clickable source yet.
How Free recoil is calculated
E_recoil = ½ · m_firearm · v_recoil²
Inputs
- m_firearm2.575 kg5.677 lbestimatedFrom the Wikipedia infobox, uncited there.
- v_recoil1.041 m/s3.415 fpsestimated
Assumptions
- Propellant gas momentum is excluded: ARMAG does not record charge weights. This is therefore a lower bound on the real free recoil, consistent between entries but smaller than a figure that includes the gas term.
- Free recoil: the arm is unrestrained. Stock design, muzzle devices, stance and shooter mass are not modelled, because none of them is a property of the arm.
No input on this calculation carries a clickable source yet.
How Capacity is calculated
as published for the primary chambering
Inputs
- capacity30estimatedFrom the Wikipedia infobox, uncited there: the Cx4 accepts adapted Beretta pistol magazines from 8 to 30 rounds depending on the pistol platform; 30 is the largest offered for this chambering.
No input on this calculation carries a clickable source yet.
Derived figures
Computed from the sourced values above. Open ƒ on any figure for the formula, its inputs, and the assumptions it makes.
How Momentum is calculated
p = m · v
Inputs
- m7.452 g115.0 grverifiedsource115 gr as published, converted to grams.
- v359.7 m/s1,180 fpsverifiedMeasured with a 101.6 mm barrel, not this arm's 423 mm. Velocity outside the sourced range is not projected.
1 of 2 inputs link to their source.
How Sectional density is calculated
SD = mass(gr) / (7000 · diameter(in)²)
Inputs
- mass7.452 g115.0 grverifiedsource115 gr as published, converted to grams.
- diameter9.03 mm0.3555 inverifiedsourceCartridge maximum, dimension G1.
Assumptions
- Reported in the conventional lb/in² so it is directly comparable with published figures.
2 of 2 inputs link to their source.
How Power factor is calculated
PF = mass(gr) · velocity(fps) / 1000
Inputs
- mass7.452 g115.0 grverifiedsource115 gr as published, converted to grams.
- velocity359.7 m/s1,180 fpsverifiedMeasured with a 101.6 mm barrel, not this arm's 423 mm. Velocity outside the sourced range is not projected.
Assumptions
- A competition classification defined by the IPSC and USPSA rulebooks, stated in their units. It describes a scoring category, not an effect.
1 of 2 inputs link to their source.
How Magazine dump is calculated
t = (n − 1) / (rpm / 60)
Not calculated: rpm has no sourced figure yet. Nothing is substituted for a missing input.
Assumptions
- Cyclic rate held for the whole magazine, no stoppages, trigger held down. A theoretical figure for comparing mechanisms, not a measured one.
No input on this calculation carries a clickable source yet.
How Sight error at 1 mm is calculated
θ = atan(misalignment / sight radius)
Inputs
- sight radius327 mm12.87 inestimatedFrom the Wikipedia infobox, uncited there.
- misalignment1 mm0.03937 inverified
Assumptions
- Shows what a stated aiming error costs. The misalignment is the reader’s figure; the site does not claim how well anyone aims.
No input on this calculation carries a clickable source yet.
Variants
Mx4 Storm
The select-fire submachine-gun version, with a shorter barrel and automatic fire.
- Mass, empty
- 2.48 kg5.467 lbestimated
From the Wikipedia infobox, uncited there, where it is given for the Mx4 Storm.
- Length
- 647 mm25.47 inestimated
From the Wikipedia infobox, uncited there, where it is given for the Mx4 Storm.
- Barrel length
- 312 mm12.28 inestimated
From the Wikipedia infobox, uncited there, where it is given for the Mx4 Storm. The article text gives it as a 12-inch barrel.
- Cyclic rate
- 1,000 rpmestimated
From the Wikipedia infobox, uncited there ("~1,000 rounds/min"); only the Mx4 fires automatically, so the figure can only be its.
| Variant | Years | Changes |
|---|---|---|
| Mx4 Storm | — | Mass, empty, Length, Barrel length, Cyclic rate, Chamberings, Fire modes |
Specifications
Every row here is generated from the schema, so a figure recorded on this entry cannot be missing from the table, and the same rows, read the same way, are what the comparison shows.
Identity
- Type
- Carbine
- Action
- Self-loading
- Fire modes
- Semi-automatic
- Operating system
- Blowback, simple
- Designed in
- Italy
- Produced in
- Introduced
- 2003
- Production
- 2003–present
Dimensions and mass
- Mass, empty
- 2.575 kg5.677 lbestimated
From the Wikipedia infobox, uncited there.
- Magazine, empty
- not recorded
- Length
- 755 mm29.72 inestimated
From the Wikipedia infobox, uncited there.
- Length, folded
- not recorded
- Width
- 63 mm2.480 inestimated
From the Wikipedia infobox, uncited there.
- Height
- 190 mm7.480 inestimated
From the Wikipedia infobox, uncited there.
- Barrel length
- 423 mm16.65 inestimated
From the Wikipedia infobox, uncited there (422.5 mm).
Sights and rifling
- Sight radius
- 327 mm12.87 inestimated
From the Wikipedia infobox, uncited there.
- Sight height over bore
- not recorded
- Rifling twist
- not recorded
- Twist direction
- not recorded
- Grooves
- not recorded
- Sight graduation
- not recorded
Operation
- Cyclic rate
- not recorded
- Trigger pull
- not recorded
- Effective range
- 200 m218.7 ydestimated
From the Wikipedia infobox, uncited there, given as an approximate figure.
- Units produced
- not recorded
- Launch price
- not recorded
Chamberings
- 9x19mm Parabellumprimary30 rounds
- 9×21mmnot recorded rounds
- .40 S&Wnot recorded rounds
- .45 ACP8 rounds
Scale
A to-scale outline against family siblings. The dimensions are sourced; the shape is a representative outline for the type, and says so.
- Beretta Cx4 Storm755 mm29.72 in
Representative outline: the dimensions are sourced, the shape is not. Overall length, and barrel length where recorded, are drawn from this entry's own figures; the profile is a generic one for the firearm type and says nothing about this arm's actual contours.
Gallery
Image credit
- Title
- File:Storm Complete.jpg
- Author
- No machine-readable author provided. Ajaka~commonswiki assumed (based on copyright claims).
- Licence
- Public domain
- Source
- https://commons.wikimedia.org/wiki/File:Storm_Complete.jpg
Detail
The Cx4 Storm is a semi-automatic pistol-calibre carbine Beretta introduced in 2003, built around a single practical idea: letting an owner of a Beretta pistol carry one magazine type for two different firearms. It accepts magazines from the Beretta 92/96, 8000 “Cougar” and Px4 pistol families through swappable magwell sleeves and release buttons, so a shooter equipped with, say, a 92FS in 9×19mm can feed the carbine from the same magazines rather than stocking a second pattern.
It is a straight blowback design with a Picatinny rail for optics and a tri-rail forend for lights, lasers and grips, and its controls (fire selector, charging handle, ejection port and magazine release) can all be switched to the left side for a left-handed shooter. Beretta offers the Cx4 in 9×19mm Parabellum, 9×21mm, .40 S&W and .45 ACP, the last of these restricted to the 8000 “Cougar” magazine’s eight-round capacity because no larger Beretta pistol magazine exists in that calibre.
A select-fire submachine-gun variant, the Mx4 Storm, shares the Cx4’s mechanism and magazine-compatibility concept adds automatic fire, uses a shorter 312mm barrel, and is most commonly seen with a 30-round 9mm magazine compatible with the Beretta 92. It uses the same action and operating system, so it is recorded here as a variant, with the infobox figures given for it.
No maker specification sheet independent of Wikipedia’s own uncited figures was found, so the mass, dimensions, barrel length, sight radius and effective range recorded here are estimated rather than verified. Magazine capacity for the 9×21mm and .40 S&W chamberings is not sourced at all and is left as an honest gap; no rifling twist rate is published for any chambering.
References
This entry's own bibliography. Every citation key on this page resolves into this list.
- Beretta Cx4 Storm · Wikipedia · 1370412896 · read 2026-09-24 · CC BY-SA 4.0
Last verified 2026-09-24 · review status: agent-populated