Personal defense weapon

Self-defense firearm

The FN P90, one of the most well-known personal defense weapons (PDW)

Personal defense weapons (PDWs) are a class of compact, magazine-fed automatic firearms that are typically submachine guns designed to fire rifle-like cartridges. Most PDWs fire a small-caliber (generally less than 8 mm or 0.31 in in bullet diameter), high-velocity centerfire bottleneck cartridge resembling a scaled-down intermediate cartridge, essentially making them an "in-between" hybrid between a submachine gun and a conventional carbine assault rifle.

The use of these rifle-like cartridges gives the PDWs much better ballistic performance (effective range, external ballistics and armor-penetrating capability) than conventional submachine guns, which fire larger-caliber but slower and less aerodynamic handgun cartridges. The low recoil of these "sub-intermediate" cartridges also makes muzzle jumps on PDWs (which typically have short barrels) much easier to handle than short-barreled rifles, especially when shooting in automatic fire or burst fire.

The name describes the weapon's original conceptual role: as a compact but powerful small arm that can be conveniently carried for personal defense, usually by support personnel behind the front line such as military engineers, logistic drivers, medical specialists, artillery crews, or signallers. These "second-line" personnel are not strictly combat troops expected to directly engage the enemy, but may still be at risk of encountering decently equipped (and often well-armored) hostile skirmishers and infiltrators, therefore having to defend themselves in close quarters. Such encounters will warrant an effective weapon that is easy to use while having sufficient firepower to suppress enemy charges and hold them beyond a safe perimeter to prevent the defenders from being overrun, but the risk of hostility is rare enough that a standard service rifle would be an unnecessary burden during their normal duties.

Because of their light weight, controllability, ease of operation and close-range effectiveness (can penetrate a NATO CRISAT vest[1] or an NIJ IIIA soft Kevlar armor[2][3] at up to 200 m (220 yd)), PDWs have also been used by special forces, paramilitaries, heavily armed tactical police, and bodyguards.

## History

[edit]

9mm Parabellum "Red 9" Mauser C96 with stock

In the late 19th and early 20th centuries, shortened versions of the infantry rifle were issued as "carbines" for cavalry troops and gun crews. This designation was dropped as infantry rifle designs became shortened overall, such as in the Short Magazine Lee–Enfield rifle. Thereafter, handguns were typically issued as self-defense weapons. However, they were not effective in most close combat situations. As a result, during the First World War, the Mauser C96 and artillery versions of the Luger pistol were issued with attachable shoulder stock holsters, which allowed for greater control and accuracy.

Pedersen device drawing

During World War I, the United States secretly developed the Pedersen device attachment for the M1903 Springfield rifle that allowed it to fire the .30-18 Auto (7.65×20mm Longue) pistol cartridge in semi-automatic mode.[4][5] This attachment was developed to allow an infantryman to convert "his rifle to a form of submachine gun or automatic rifle" in approximately 15 seconds.[5][4]

Production of the device and modified M1903 rifles started in 1918.[5] However, the war ended before they were sent to Europe.[4][5] The contract was cancelled on March 1, 1919, after production of 65,000 devices, 1.6 million magazines, 65 million cartridges and 101,775 modified Springfield rifles.[4][5][6] The Pedersen device was declared surplus in 1931.[6] To prevent them from falling into the hands of the lawless, nearly all of the stored devices were destroyed by the Army except for a few examples kept by Ordnance Department.[7][6]

The Chauchat-Ribeyrolles 1918

In 1918, Ribeyrolles, Sutter and Chauchat designed the Chauchat-Ribeyrolles 1918 submachine gun. This weapon was meant to be used for close-range protection for the French tank crews. The weapon is based on the RSC Mle. 1917 semi-automatic rifle mechanism. The first trials used a Mannlicher–Berthier clip holding eight cartridges. The trials continued until 1919 with a weapon using the same magazine as the Chauchat. The results were satisfactory but the weapon was too powerful for the intended self-protection use. A mix of standard and tracer bullets was planned to be used to assist in aiming.

M1 Garand and M1 Carbine

In 1938, the U.S. Army Ordnance Department received a request for a light rifle to be issued to mortarmen, radiomen, drivers, clerks, cooks, and similar grades.[8] During field exercises, these troops found that the M1 Garand rifle was too heavy and too cumbersome for general issue. And, while handguns are undeniably convenient, they had limited range, accuracy and power. This request was refused by authorities.[8]

In 1940, after Germany's use of glider-borne and paratroop forces to infiltrate and attack strategic points behind the front lines,[9][10] the request for a light rifle was resubmitted and subsequently approved.[8] U.S. Army Ordnance issued a requirement for a "light rifle" with greater range, firepower, and accuracy than the M1911 pistol while weighing half as much as the M1 Garand.[11] As a result, the U.S. developed the semi-automatic M1 Carbine and shortly thereafter the select-fire M2 Carbine. Widely employed until the end of the Vietnam War, these carbines are generally considered the forerunners of modern personal defense weapons.[12]

AO-46

In 1969, AO-46 was an unsolicited design by Peter Andreevich Tkachev working at TsNIITochMash. Although not accepted for service, this design, in combination with report of the US use of the XM-177 in Vietnam led the GRAU to start the competition known as Project Modern, which led to the adoption of AKS-74U for service.[13][14]

M231 Firing Port Weapon

In 1979, Rock Island Arsenal designed a version of the M16 assault rifle adapted for shooting from firing ports on the M2 Bradley, named the M231 Firing Port Weapon. In 1980, the weapon was adopted as the M231.[15] Although most of the Bradley AFV's ports have since been removed, these weapons are maintained, and are used by crews for self-defense, close-quarters situations, and for firing from the rear door firing ports as intended.

FN P90 Heckler & Koch MP7A1

Developed during the 1980s, the "Personal Defense Weapon" (PDW) concept was created in response to a NATO request as a replacement for 9×19mm Parabellum submachine guns. The PDW is a compact automatic weapon that can defeat enemy body armor and which can be used conveniently by non-combatant and support troops, as well as a close quarters battle weapon for special forces and counter-terrorist groups.[16][17]

Introduced in 1991, the FN P90 features a bullpup design with a futuristic appearance. It has a 50-round magazine housed horizontally above the barrel, an integrated reflex sight and fully ambidextrous controls.[18] A simple blow-back automatic weapon, it was designed to fire the FN 5.7×28mm cartridge which can penetrate soft body armor.[16][17] The P90 was designed to have a length no greater than a man's shoulder width, to allow it to be easily carried and maneuvered in tight spaces, such as the inside of an armored vehicle.[18]

Introduced in 2001, the Heckler & Koch MP7 is a direct rival to the FN P90. Featuring a more conventional-looking design, the MP7 uses a short-stroke piston gas system as used on H&K's G36 and HK416 assault rifles, in place of a blowback system traditionally seen on submachine guns.[19] The MP7 is able to use 20-, 30- and 40-round magazines and fires 4.6×30mm ammunition which can penetrate soft body armor. Due to the heavy use of polymers in its construction, the MP7 is much lighter than older SMG designs, weighing only 1.2 kg (2.65 lb) with an empty 20-round magazine.

Russia uses 7N21 and 7N31 cartridges which are hotter loaded 9x19mm Parabellum cartridges with special armor piercing bullets. The armor piercing bullets consist of a hardened steel core inside a lighter sleeve which damages soft targets but strips off if it hits an armored target and lets the core pierce it.[20][21][22][23] The RG054 variant of the 9×21mm cartridge follows the same pattern.[24][23] The space between the core and the bimetallic jacket is filled with polyethyelene which results in 7N21 being lighter than regular 9×19mm, 7N31 is even lighter than 7N21.[25] Using a different variant of the same cartridge bears the advantage that regular ammunition can still be used. The PP-19-01 Vityaz, PP-2000 and GSh-18 can use regular 9×19mm Parabellum as well as the 7N21 and 7N31 ammunition. The Russian Aerospace Forces added the PPK-20 variant of the PP-19-01 Vityaz into the ejection survival kits of the MiG-29, Mig-35, Su-24, Su-27, Su-30SM, Su-34, Su-35 and Su-57.[26]

## Applications

[edit]

Three civilian 5.7×28mm cartridges as used in the P90. The left cartridge has a plain hollow tip, the center cartridge has a red plastic V-max tip intended to ensure bullet expansion, and the right cartridge has a blue plastic V-max tip.

The PDW concept has not been widely successful, partly because existing PDWs are not significantly cheaper to manufacture than carbines or full-size military rifles. Most PDWs also use a proprietary cartridge, such as the 5.7×28mm cartridge for the FN P90 or the 4.6×30mm for the H&K MP7, neither of which were originally compatible with any existing pistols or rifles/carbines. Although both manufacturers planned handguns that used the same proprietary rounds, only FN went forward with production of the Five-SeveN pistol, which was the only handgun option available for the 5.7×28mm cartridge for over two decades until the introduction of Ruger-57 in 2019. In turn, this made the PDW cartridges expensive to consumers due to the lack of mass production.[27]

Though personal defense weapons have not been very popular for their intended application, they have been acquired by various military special forces units and law enforcement groups, as an upgrade for their older submachine guns[citation needed]. The FN P90 and Five-seven pistol are used by military and police forces in over 40 countries, including Canada, Cyprus, France, Greece, India, Peru, Poland, Spain, and the United States.[28] The Heckler & Koch MP7 is also used in a number of countries, including Austria, France, Germany, Ireland, Norway, Malaysia, and the United Kingdom.[29][30]

## PDW cartridges

[edit]

* 4.38×30mm Libra
* 4.5×26mm MKR
* HK 4.6×30mm
* 5.56×30mm MINSAS
* 5.56×21mm PINDAD
* .224 Boz
* FN 5.7×28mm
* 5.8×21mm DAP
* 6.5×25mm CBJ
* 7.5 FK BRNO
* 7.92×24mm[31][32][33]
* 9x19mm 7N21, 9x19mm 7N31
* 9×21mm Gyurza

## Traditional personal defense weapons

[edit]

Name  | Cartridge  | Country  | Serial production  | Note

|
|
|
|

Amogh carbine | 5.56×30mm MINSAS | India | yes  |
AR-57 | 5.7×28mm | United States | yes  | M16 lower receiver with a redesigned upper receiver fed by FN P90 magazines
Brügger & Thomet APC9 RWS ACTION SE Gen. II SXF variant  | 9×19mm, regular loads and armor piercing RWS ACTION SE Gen. II SXF loads  | Switzerland |  |
Brügger & Thomet MP9 | 6.5×25mm CBJ, 9×19mm | Switzerland | yes  |
CF-05 | 5.8×21mm | China | no  | Competitor to the QCW-05
Colt MARS  | 5.56×30mm MARS  | United States | no  |
Colt SCAMP | .22 SCAMP  | United States | no  |
ČZW-438 | 4.38×30mm Libra | Czech Republic | no  |
FN P90 | 5.7×28mm | Belgium | yes  |
Gepard (submachine gun) | 9x17mm
9×18mm Makarov
9×19mm
9×19mm 7N21
9×21mm
9×21mm Gyurza
9×30mm Grom | Russia | no  |
Heckler & Koch MP7 | 4.6×30mm | Germany | yes  |
Interdynamics MKR | 4.5×26mm MKR | Sweden | no  |
Modern Sub Machine Carbine | 5.56×30mm MINSAS | India | yes  |
MP5 rechambering kit for 6.5×25mm CBJ | 6.5×25mm CBJ | Sweden |  |
PP-19-01 Vityaz | 9×19mm
9×19mm 7N21
9×19mm 7N31 | Russia | yes  |
PP-2000 | 9×19mm
9×19mm 7N21
9×19mm 7N31 | Russia | yes  |
PP-90M1 | 9×19mm
9×19mm 7N31 | Russia | yes  |
QCW-05 | 5.8×21mm | China | yes  |
Saab Bofors Dynamics CBJ-MS | 6.5×25mm CBJ | Sweden | no  |
SR-2 Veresk | 9×21mm Gyurza | Russia | yes  |
ST Kinetics CPW | 4.6×30mm, 5.7×28mm, 9×19mm[34] | Singapore | yes  |
Tuma MTE 224 VA | .224 Voboril | Switzerland | no  |
VBR-Belgium PDW[35] | 7.92×24mm  |  |
Zittara-21 | 5.56×30mm MINSAS | India/Israel | No  |

## Other

[edit]

Name  | Cartridge  | Country  | Serial production  | Note

|
|
|
|

AAC Honey Badger | .300 AAC Blackout (7.62×35mm) | United States | yes  |
AKS-74U | 5.45×39mm | Soviet Union | yes  |
AM-17 | 5.45×39mm | Russia | By 2025  |
AO-46 | 5.45×39mm | Soviet Union | no  |
Barrett REC7 PDW | 6.8mm Remington SPC (6.8×43mm) | United States |  |
Bushmaster Arm Pistol | 5.56×45mm | United States | no  |
Chauchat-Ribeyrolles 1918 | 8×50mmR Lebel | France | no  |
Floro PDW | 5.56×45mm | Philippines |  |
FN SCAR PDW | 5.56×45mm | Belgium | yes  | got replaced by FN SCAR SC
FN SCAR SC | 5.56×45mm, .300 AAC Blackout (7.62×35mm) | Belgium | yes  | A new variant of the FN SCAR, with a .300 Blackout chambering kit released in late 2018.[36]
GA Personal Defense Weapon | 7.62×37mm Musang | Philippines |  |
GAU-5A Aircrew Self Defense Weapon | 5.56×45mm | United States | yes  | Takedown gun
Globserver PDW[37] | 9x19mm Parabellum | Hungary | yes  |
Heckler & Koch MP5K-PDW | 9×19mm Parabellum | Germany | yes  |
Knight's Armament Company PDW | 6×35mm KAC,.300 Blackout | United States | yes  |
M231 Firing Port Weapon | 5.56×45mm | United States | yes  |
Magpul PDR | 5.56×45mm | United States | no  |
SIG MCX Rattler | 5.56×45mm | United States | yes  |  |

## PDW-caliber handguns

[edit]

Name  | Cartridge  | Country  | Serial production  | Note

|
|
|
|

Accelerator Pistol MP-5.7[38] | 5.7×28mm | United States | yes  |
Arsenal Firearms Strike One | 9×19mm
9×19mm 7N21
9×19mm 7N31

9×21mm IMI .357 SIG .40 S&W

| Russia

Italy

| yes  |
CMMG Dissident, Mk4/Mk57[39][40] | 5.7×28mm | United States | yes  | Mk57 versions can use the Five-seveN magazine
DBX57[41] | 5.7×28mm | United States | yes  | can use the Five-seveN magazine
FK BRNO Field Pistol, PSD | 7.5x27mm | Czech Republic | yes  |
FN Five-seven | 5.7×28mm | Belgium | yes  |
Fort 28[42][43] | 5.7×28mm | Ukraine |  |
Glock 17 rechambering kit for VBR 7.92x24mm[44] | 7.92×24mm  | Belgium |  |
Glock 17 rechambering kit for 6.5×25mm CBJ | 6.5×25mm CBJ | Sweden |  |
GSh-18 | 9×19mm
9×19mm 7N21 | Russia | yes  |
Heckler & Koch UCP | 4.6×30mm | Germany | no  |
KALEKALIP KNG-C5[45] | 5.56×45mm NATO | Turkey | no  |
Kel-Tec P50 | 5.7×28mm | United States | yes  |
M&P 5.7 | 5.7×28mm | United States | yes  |
SIG Sauer SP 2022 rechambering kit for 6.5×25mm CBJ | 6.5×25mm CBJ | Sweden |  |
SR-1 Vektor | 9×21mm Gyurza | Russia | yes  |
SR-2 Udav | 9×21mm Gyurza | Russia | yes  |
Lebedev pistol | 9×19mm
9×19mm 7N21 | Russia | yes  |
MPA57[46] | 5.7×28mm | United States | yes  |
MP-443 Grach | 9×19mm
9×19mm 7N21
9×19mm 7N31 | Russia | yes  |
Pindad PS-01 | 5.56×21mm PINDAD | Indonesia | no  |
PSA 5.7 Rock | 5.7×28mm | United States | yes  |
QSZ-92 / QSW-06 | 5.8×21mm | China | yes  |
QSZ-11[47] | 5.8×21mm | China | yes  |
RSh-12 | 12.7×55mm STs-130 | Russia | yes  |
Ruger-57 | 5.7×28mm | United States | yes  |
VBR PDW/CQBW[48][49] | 4.6×30mm, 5.7×28mm, VBR 6 mm CQBW, 7.92×24mm  | Belgium |  |
X-5.7P Basic Pistol 30RD[50] | 5.7×28mm | United States | yes  |

## PDW-caliber civilian firearms

[edit]

PDW-caliber guns without select fire capabilities

Name  | Cartridge  | Country  | Note

|
|
|

AR-57 | 5.7×28mm | United States | M16 lower receiver with a redesigned upper receiver fed by FN P90 magazines
CMMG Banshee, Mk4/Mk57[51][52][53]

CMMG Resolute, Mk4/Mk57[54][55]

| 4.6×30mm

5.7×28mm

| United States | Mk57 versions can use the Five-seveN magazine
Excel Arms MR-57[56] | 5.7×28mm | United States |
MPA57000DMG

[57]

| 5.7×28mm | United States |
PS90 | 5.7×28mm | Belgium |
R50 | 5.7×28mm | United States | P50 pistol with longer barrel and stock
Ruger LC Carbine[58] | 5.7×28mm | United States |
Savage 25 Walking Varminter[59] | 5.7×28mm | United States |

## See also

[edit]

* Assault rifle
* Assault weapon
* Automatic shotgun

## References

[edit]

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Wikimedia Commons has media related to Personal defense weapons.

* v
* t
* e

Modern personal defense weapons (PDWs) and cartridges

Personal defense weapons|

* AO-46
* AAC Honey Badger
* AKS-74U
* Brügger & Thomet MP9
* Bushmaster Arm Pistol
* CF-05
* ČZW-438
* Floro PDW
* FN P90
* FN SCAR PDW & FN SCAR SC
* GA Personal Defense Weapon
* GAU-5A Aircrew Self Defense Weapon
* Gepard (submachine gun)
* Heckler & Koch G11 PDW
* Heckler & Koch MP5K-PDW
* Heckler & Koch MP7
* Interdynamics MKR
* Knight's Armament Company PDW
* Magpul PDR
* Interdynamics MKS
* Joint Venture Protective Carbine
* PP-19 Vityaz
* PP-2000
* PP-90M1
* QCW-05
* Saab Bofors Dynamics CBJ-MS
* SR-2 Veresk
* ST Kinetics CPW
* SIG MCX Rattler

PDW-caliber pistols|

* FN Five-seven
* FK BRNO Field Pistol, PSD
* GSh-18
* Heckler & Koch UCP
* Kel-Tec P50
* MP-443
* M&P 5.7
* Pindad PS-01
* PSA 5.7 Rock
* QSW-06
* QSZ-92
* QSZ-11
* Ruger-57
* SR-1 Vektor

PDW cartridges|

* 4.38×30mm Libra
* 4.5×26mm MKR
* HK 4.6×30mm
* 5.56×21mm PINDAD
* 5.56×30mm MINSAS
* .224 Boz
* FN 5.7×28mm
* 5.8×21mm DAP92
* 6.5×25 CBJ-MS
* 7.5 FK
* 9×19 mm 7N31
* 9×21mm Gyurza
* 9×39mm

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