FB Glauberyt
FB "Łucznik" RadomLate Cold War
Also known as Pistolet maszynowy wz. 1984, PM-84
Image credit
- Title
- File:20250517 224019 Submachine gun PM-84 Glauberyt. Voivodeship Police Headquarters in Łódź, Poland.jpg
- Author
- WrS.tm.pl
- Licence
- Public domain
- Source
- https://commons.wikimedia.org/wiki/File:20250517_224019_Submachine_gun_PM-84_Glauberyt._Voivodeship_Police_Headquarters_in_Łódź,_Poland.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 165 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_firearm1.84 kg4.057 lbestimatedsourcePM-84, from the infobox; no inline citation is given there.
- v_recoil1.067 m/s3.502 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
- capacity25estimatedsourcePM-84, published as 15- or 25-round detachable box magazines, from the infobox, uncited there; 25 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 165 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 165 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
- n25estimatedsourcePM-84, published as 15- or 25-round detachable box magazines, from the infobox, uncited there; 25 rounds recorded here as the larger of the two published capacities.
- rpm600 rpmestimatedsourcePM-84, from 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.
Variants
PM-84P
A 9x19mm Parabellum chambering of the Glauberyt, for markets and customers using NATO-standard pistol ammunition rather than 9x18mm Makarov.
- Mass, empty
From the infobox, uncited there.
- Length
Stock extended, from the infobox, uncited there.
- Length, folded
Stock collapsed, from the infobox, uncited there.
- Barrel length
From the infobox, uncited there.
- Cyclic rate
From the infobox, uncited there.
| Variant | Years | Changes |
|---|---|---|
| PM-84P | — | Mass, empty, Length, Length, folded, Barrel length, Cyclic rate, Chamberings |
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
- Poland
- Produced in
- Introduced
- 1984
- Production
- not recorded
Dimensions and mass
- Mass, empty
PM-84, from the infobox; no inline citation is given there.
- Magazine, empty
- not recorded
- Length
PM-84, stock extended, from the infobox, uncited there.
- Length, folded
PM-84, stock collapsed, from the infobox, uncited there.
- Width
PM-84, from the infobox, uncited there.
- Height
- not recorded
- Barrel length
PM-84, 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
Operation
- Cyclic rate
PM-84, from the infobox, uncited there.
- Trigger pull
- not recorded
- Effective range
- not recorded
- Units produced
- not recorded
- Launch price
- not recorded
Chamberings
- 9×18mm Makarovprimary25 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.
- FB Glauberyt560 mm22.05 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. FB Glauberyt records no height, so its outline is drawn at the type's proportion. That height is part of the shape, not a measurement.
Gallery
Image credit
- Title
- File:PM-84 NTW 6 93.jpg
- Author
- Aleksander Rawski
- Licence
- Public domain
- Source
- https://commons.wikimedia.org/wiki/File:PM-84_NTW_6_93.jpg
Detail
The FB Glauberyt, officially the Pistolet maszynowy wz. 1984 and commonly known by its production designation PM-84, is a simple-blowback submachine gun a Radom design team led by Ryszard Chełmicki won a competing-teams design process for in the early 1980s. It was developed for armoured-vehicle crews, reconnaissance troops and police and special services, chambered in 9×18mm Makarov to match the standard sidearm cartridge of the Warsaw Pact, and built from sheet steel subjected to heat treatment to keep production simple and inexpensive.
Fabryka Broni “Łucznik” – Radom put it into production in 1984, and it has remained in Polish police, army and military-gendarmerie service since. A parallel 9×19mm Parabellum chambering, the PM-84P, was developed for export and NATO-compatible customers, sharing the same action but a different magazine and slightly larger dimensions; it is modelled on this page as a variant. Later derivatives, the PM-98, PM-98S and PM-06, extended the same basic design further with a longer barrel, additional rail and stock options and, in the PM-98S, a higher cyclic rate; those differ enough in size and equipment that they are not modelled here. The type saw later combat use well beyond Poland, including with Iraqi forces during and after the 2003 invasion.
Mass, length, barrel length, width and cyclic rate for both the PM-84 and PM-84P 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.
- FB Glauberyt · Wikipedia · 1345130460 · read 2026-09-24 · CC BY-SA 4.0
Last verified 2026-09-24 · review status: draft