Uzi
עוזי
Israel Weapon Industries1950–presentEarly Cold War
Also known as Uzi submachine gun
Image credit
- Title
- File:1952 General von Horn IMI Uzi 001 (cropped).jpg
- Author
- Armémuseum (Swedish Army Museum)(attribution required)
- Licence
- CC BY 4.0
- Source
- https://commons.wikimedia.org/wiki/File:1952_General_von_Horn_IMI_Uzi_001_(cropped).jpg
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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 260 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 (SPEC.md §8.2)
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.
2 of 4 inputs link to their source.
How Free recoil is calculated
E_recoil = ½ · m_firearm · v_recoil²
Inputs
- m_firearm3.5 kg7.716 lbverifiedsource
- v_recoil0.7659 m/s2.513 fpsestimated
Assumptions
- Propellant gas momentum is excluded: ARMAG does not record charge weights (SPEC.md §14). 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.
1 of 2 inputs link to their source.
How Capacity is calculated
as published for the primary chambering
Inputs
- capacity32verifiedsourceMagazines of 20, 25, 32, 40 and 50 rounds are listed.
1 of 1 inputs link to their source.
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 260 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 260 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)
Inputs
- n32verifiedsourceMagazines of 20, 25, 32, 40 and 50 rounds are listed.
- rpm600 rpmverifiedsourceFull-size Uzi. The Mini Uzi is published at 950 rpm and the Micro at 1,200–1,500.
Assumptions
- Cyclic rate held for the whole magazine, no stoppages, trigger held down. A theoretical figure for comparing mechanisms, not a measured one.
2 of 2 inputs link to their source.
How Sight error at 1 mm is calculated
θ = atan(misalignment / sight radius)
Not calculated: sight radius has no sourced figure yet. Nothing is substituted for a missing input.
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.
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
- Submachine gun
- Action
- Self-loading
- Fire modes
- Semi-automatic
- Fully automatic
- Operating system
- Blowback, simple
- Designed in
- Israel
- Introduced
- 1954
- Production
- 1950–present
Dimensions and mass
Sights and rifling
- Sight radius
- not recorded
- Sight height over bore
- not recorded
- Rifling twist
- not recorded
- Twist direction
- not recorded
- Grooves
- not recorded
- Sight graduation
- not recorded
Chamberings
- 9x19mm Parabellumprimary32 rounds
- .45 ACP16 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.
- Uzi640 mm25.20 inheight not recorded
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. Uzi records no height, so its outline is drawn at the type's proportion — that height is part of the shape, not a measurement.
Detail
Uziel Gal’s contribution was not the telescoping bolt — the Czech CZ 23 had it first — but the consequences he drew from it. Wrapping the bolt around the rear of the barrel puts most of its mass in front of the breech face at the moment of firing, which lets the weapon be short without becoming uncontrollable. Putting the magazine in the pistol grip then makes it possible to reload in the dark by bringing two hands together, which is a soldier’s argument rather than an engineer’s.
Everything else is stamped steel and simplicity: a fixed firing pin, an open bolt, a grip safety that has to be squeezed before the bolt will move at all. Israeli production ran from 1954, and the design was licensed to FN in Belgium and made under other names elsewhere.
Its era ended when body armour and vehicle work made a pistol-calibre weapon look inadequate, and the compact assault rifle took its place in most of the roles it had held.
The article gives no width, height or sight radius, and no unloaded weight distinct from the 3.5 kg figure recorded here.
References
This entry's own bibliography. Every citation key on this page resolves into this list.
- Uzi · Wikipedia · 1369233342 · read 2026-08-31 · CC BY-SA 4.0
Last verified 2026-08-31 · review status: agent-populated