PM-84
PM-84 Glauberyt is a Polish submachine gun designed by R. Chełmicki, J. Chętkiewicz, and S. Brix. The gun was accepted for use in Polish Armed Forces in the late 80-ties replacing Polish PM-63 RAK submachine gun. PM-84 is a blowback operated gun which fires from closed bolt. When bolt is in its forward position it completly encircles the chamber. The gun has two recoil springs. P-84 has receiver manufactured from steel stampings, and the bolt made from machined steel. The cocking handle is ambidextrous. The bolt catch is located on the left side of the receiver just above the pistol grip. The trigger mechanism with internal hammer is equipped with fire selector switch which doubles as manual safety. Fire selector being located to the rear of the bolt catch has positions for single shot, full automatic fire, and for safe mode. PM-84 features inertia type fire rate reducer located in its grip. The gun is chambered for Soviet 9x18mm 57-N-181S cartridge (commonly known as 9x18mm Makarov) and is fed from double column 15 or 25 rounds magazine being located in the pistol grip clad with plastic panels. Magazine latch is located under the pistol grip and it locks against magazine bottom. PM-84 has folding plastic foregrip and folding steel stock. There is a lug for silencer located on the barrel. The barrel could be removed without field stripping the weapon. The weapon has a peep sight for 75 meters and an open sights set for 75, 150, and 200 meters. Not many of PM-84 guns were produced because in the 90-ties (after the fall of Soviet Union), Polish military was no more in need of a submachine type weapon utilizing Soviet 9x18mm cartridge. Recently the PM-84P submachine gun replaced PM-84 in Polish Armed Forces. In my opinion PM-84 design was superior to PM-63 RAK, however the quality of a manufacturing process was inferior to its precursor.
PM-84P
PM-84P (P as Parabellum) is a modification of PM-84 Glauberyt which was adopted by Polish Armed Forces in 1994. PM-84P is a blowback operated weapon which fires from closed bolt. When bolt is in its forward position it completly encircles the chamber. The gun has a trigger mechanism with internal hammer. PM-84P is chambered for 9x19mm Parabellum cartridge and is fed from double column 15 or 25 rounds magazine located in the grip. Magazines of PM-84P and MP-84 are not compatible. Magazine latch is located under pistol grip and locks against the bottom of the magazine. The weapon has strenghtened receiver, modified receiver cover, heavier bolt, and longer barrel without a lug for silencer. Barrel could be removed without field stripping the gun. Modified cocking handles are on both sides of the receiver, but police version has only one cocking handle on the receiver's left side. PM-84P features inertia type fire reducer located in pistol grip. Gun has folding plastic foregrip and strenghtened folding steel stock. The bolt catch is located on the left side of the receiver just above pistol grip. To its rear is located fire selector switch having three positions for single shot, full auto, and safe mode. PM-84P has peep sight for 75 or 150 meters and an open sight set for 75 or 150 meters. PM-84P is of higher quality of manufacture than PM-84.
PM-98
PM-98 is a modification of PM-84P which was designed in tha late 90-ties. PM-98 is a blowback operated weapon which fires from closed bolt. When bolt is in its forward position it completly encircles the chamber. Weapon has a trigger mechanism with internal hammer. The gun is chambered for 9x19mm Parabellum cartridge and is fed from a double column 15 or 25 rounds magazine located in pistol grip. Magazines of PM-98 and PM-84P are not compatible. Magazine latch is located on the left side of the pistol grip near the trigger guard. The weapon has only one cocking handle on the receiver's left side. Standard model is equipped with fire rate reducer, whereas PM-98S version lacks that feature. PM-98 has modified folding steel stock and is not equipped with a folding foregrip instead the forestock accepts standard issue tactical light or laser sight. The barrel could be removed without field stripping of the gun. The bolt catch is located on the left side of the receiver just above a pistol grip. To the rear of a bolt catch there is a fire selector switch having three positions for single, full auto, and safe mode. Based on PM-98 design a prototype export version was developed chambered for 9x18mm 57-N-181S cartridge.
PM-06
PM-06 is a prototype modification of PM-98 and it was developed in 2006. PM-06 is a blowback operated weapon which fires from closed bolt. When bolt is in its forward position it completly encircles the chamber. Weapon has a trigger mechanism with internal hammer. The gun is chambered for 9x19mm Parabellum cartridge and is fed from a double column 15 or 25 rounds magazine located in pistol grip. Magazines from PM-06 and PM-98 are compatible. The magazine latch is located on a left side near the trigger guard. A bolt catch is just above left side pistol grip. To its rear there is a fire selector switch having three positions for single shot, full auto, and safe mode. Standard model is equipped with fire rate reducer whereas PM-06S version lacks that feature. The gun has only one cocking handle on the receiver's left side. PM-06 has a three position telescopic stock and the plastic handguard is capable of accepting standard issue tactical light or laser sight. The stock being in-line with a barrel bore greatly reduces the muzzle rise during auto fire. There is no folding foregrip. Picatinny rail and modified sights are installed on the receiver cover.
PM-84P with foregrip and stock extended
PM-06, photo was reproduced from commercial in Polish "Broń i Amunicja" magazine (in English Arms and Ammo)
BRS-99
BRS-99 is a semi-automatic version of PM-98 developed in the late 90-ties. BRS-99 is a blowback operated weapon which fires from closed bolt. When bolt is in its forward position it completly encircles the chamber. Weapon has a trigger mechanism with internal hammer. The gun is chambered for 9x19mm Parabellum cartridge and is fed from a double column 15 or 25 rounds magazine located in pistol grip. Magazines from BRS-99 and PM-98 are compatible. The magazine latch is located on a left side near the trigger guard. Gun has only one cocking handle located on the receiver's left side. A bolt catch is just above left side pistol grip. To its rear there is a safety ON/OFF lever. BRS-99 has a folding steel stock and a plastic handguard accepting standard issue tactical light or laser sight. The gun lacks folding foregrip. The weapon has longer barrel than PM-98, but barrel from PM-98 could be installed in BRS-99. Barrel removal could be done without field stripping the gun.
version
PM-84
PM-84P
PM-98
BRS-99
cartridge
9x18mm
9x19mm Parabellum
9x19mm Parabellum
9x19mm Parabellum
muzzle velocity
332m/s
360m/s
360m/s
400m/s
muzzle energy
336J
518J
518J
575J
barrel lenght
165mm
185mm
185mm
250mm
lenght
354mm with collapsed
stock

560mm with extended
stock
375mm with collapsed
stock

575mm with extended
stock
405mm with collapsed
stock

605mm with extended
stock
470mm with collapsed
stock

670mm with extended
stock
weight
1.84kg without
magazine

2.07kg with full load
15 rounds magazine

2.24kg with full load 25
rounds magazine
2.17kg without
magazine

2.46kg with full load
15 rounds magazine

2.62kg with full load 25
rounds magazine
2.42kg without
magazine

2.59kg with full load
15 rounds magazine

2.86kg with full load 25
rounds magazine
2.47kg without
magazine

2.76kg with full load 15
rounds magazine

2.91kg with full load 25
rounds magazine
fire selector
single fire and full auto
single fire and full auto
single fire and full auto
single fire
rate of fire
600 rounds per minute
640 rounds per minute
640 rounds per minute
only single fire
Field stripped PM-84P (Courtesy of kot2kpg from Bron.iweb.pl forum)

Barrel latch in PM-84P (kot2kpg)

Recoil springs of PM-84P (kot2kpg)

Bolt of PM-84P (kot2kpg)
Trigger mechanism of PM-84P (kot2kpg)


Police version of PM-84P. Photo is from website of Police HQ in Świnoujście
BRS-99 with short barrel from PM-98 and stock extended. Photo is from webpage of Bractwo Kurkowe (Shooters Society) in Swerzędz
BRS-99 with short barrel from PM-98. Photo is from webpage of Bractwo Kurkowe in Swerzędz
BRS-99 with short barrel from PM-98 and stock collapsed. Photo is from webpage of Bractwo Kurkowe in Swerzędz
American robot with PM-98
PM-98 has played in Resident Evil: Extinction movie