Image credit
- Title
- File:ПП-91 Кедр - ОСН Сатурн 04.jpg
- Author
- Vitaly V. Kuzmin(attribution required)
- Licence
- CC BY-SA 4.0
- Source
- https://commons.wikimedia.org/wiki/File:ПП-91_Кедр_-_ОСН_Сатурн_04.jpg
How Muzzle energy is calculated
E = ½ · m · v²
Inputs
- m6.156 g95.00 grverifiedsourcePublished as 95 gr; 1 gr = 0.06479891 g exactly.
- v319 m/s1,047 fpsverifiedMeasured with a 97 mm barrel, not this arm's 120 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 97 mm319 m/s1,047 fpsverifiedsourceBallistics table of the cited article.
Assumptions
- This figure belongs to a 97 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_firearm1.57 kg3.461 lbestimatedsourceFrom the infobox; no inline citation is given there.
- v_recoil1.251 m/s4.104 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.
1 of 2 inputs link to their source.
How Capacity is calculated
as published for the primary chambering
Inputs
- capacity30estimatedsourcePublished as a 20- or 30-round detachable box magazine, from the infobox, uncited there; 30 rounds recorded here as the larger of the two published capacities.
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
- m6.156 g95.00 grverifiedsourcePublished as 95 gr; 1 gr = 0.06479891 g exactly.
- v319 m/s1,047 fpsverifiedMeasured with a 97 mm barrel, not this arm's 120 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
- mass6.156 g95.00 grverifiedsourcePublished as 95 gr; 1 gr = 0.06479891 g exactly.
- diameter9.27 mm0.3650 inverifiedsourceC.I.P. G1, maximum bullet diameter.
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
- mass6.156 g95.00 grverifiedsourcePublished as 95 gr; 1 gr = 0.06479891 g exactly.
- velocity319 m/s1,047 fpsverifiedMeasured with a 97 mm barrel, not this arm's 120 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
- n30estimatedsourcePublished as a 20- or 30-round detachable box magazine, from the infobox, uncited there; 30 rounds recorded here as the larger of the two published capacities.
- rpm1,000 rpmestimatedsourceFrom the infobox, uncited there.
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
- Soviet Union
- Produced in
- Introduced
- 1994
- Production
- not recorded
Dimensions and mass
- Mass, empty
From the infobox; no inline citation is given there.
- Magazine, empty
- not recorded
- Length
Stock extended, from the infobox, uncited there.
- Length, folded
Stock folded, from the infobox, uncited there.
- Width
- not recorded
- Height
- not recorded
- Barrel length
From the infobox, uncited there.
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
- 9×18mm Makarovprimary30 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.
- PP-91 Kedr530 mm20.87 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. PP-91 Kedr records no height, so its outline is drawn at the type's proportion. That height is part of the shape, not a measurement.
Detail
The PP-91 Kedr is a simple-blowback submachine gun Yevgeny Dragunov, better known for the SVD sniper rifle, designed in the 1970s, though it did not enter production until 1994, after the Soviet Union’s collapse. The Zlatoust Machine-Building Plant manufactures it, chambered in the same 9×18mm Makarov cartridge as the standard Soviet and Russian service pistol, and it has been issued to Russia’s interior ministry police (MVD), drug-control service (FSKN) and prison service (FSIN) as a compact weapon for personnel who need more firepower than a pistol but not a full-size rifle.
A related design, the PP-9 Klin, shares the Kedr’s general layout but uses a delayed-blowback action and a more powerful loading of the same cartridge for improved ballistics; because that changes the weapon’s operating system, it is not modelled as a variant of this entry.
Mass, length, folded length, barrel length, cyclic rate and effective range on this page come from Wikipedia’s infobox, which carries no inline citation for any of them, so all are recorded as estimated rather than verified. No manufacturer specification sheet was reachable for this entry, and no published twist rate was found either.
References
This entry's own bibliography. Every citation key on this page resolves into this list.
- PP-91 Kedr · Wikipedia · 1372570527 · read 2026-09-24 · CC BY-SA 4.0
Last verified 2026-09-24 · review status: draft