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MPU (S.O.G.)

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« The MPU is a compact, open bolt, blowback operated submachinegun developed in 1954 chambered in 9mm. It was used in Vietnam by security forces, CIA and some Special Forces and Navy SEALs.
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The MPU 9 mm submachine gun.
The MPU 9 mm submachine gun.

The MPU is a 9 mm submachine gun used by both MACV-SOG forces and in limited numbers with CIA aircrews in ArmA 3. It was added with the release of the S.O.G. Prairie Fire Creator DLC.

Overview[]

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The MPU is a selective-fire, blowback-operated submachinegun that fires from an open bolt. It is chambered to fire the 9×19 mm cartridge.

It can only load 32-round box magazines, and is capable of attaining a fire rate of up to ~ 612 rounds per minute on full auto[CfgWp 8][Formula 1] with a muzzle velocity of 390 m/s.[CfgMa 2][note 1]

The MPU cannot be fitted with optical sights, bayonets, nor a bipod. However, the user can choose to attach a sound suppressor onto its muzzle.[CfgWp 9]

Ironsights[]

Arma3-sogpfmpu-ironsight-overview

The MPU's ironsights can be manually zeroed but are restricted to two fixed range presets of either 100 metres or 200 metres.[CfgWp 10] By default, the ironsights are set to a zeroing of 100 metres.[CfgWp 11]

Melee[]

The MPU's melee attack involves striking targets with a buttstroke. Melee attacks can inflict up to 7 points of damage if they connect with the target successfully.[CfgAm 1]

It should be noted that melee attacks cost stamina and will drain 2.45 points of stamina[Formula 2] whenever a buttstroke is performed.[SCR 1]

Ammunition[]

Ammo parameter 9 mm (Ball/Tracer)
Base damage value 7.5[CfgAm 2]
Aerodynamic friction -0.001513[CfgAm 3]
Muzzle velocity (m/s) 390[CfgMa 2]
Expected velocity (m/s) 360
[CfgAm 4][note 2]
Penetration depth (mm) 4.68
[CfgAm 5][Formula 3]
Deflection angle (degrees) 30°[CfgAm 6]

MPUs can only load two types of magazines.[CfgWp 12] They both have the same weight of 8[CfgMa 3] "mass" units:

32Rnd. MPU SMG Mag[]

Arma3-ammunition-sogpf32rndmpu

Standard 32-round box magazine loaded with a mix of 9 mm ball and tracer ammunition.[CfgMa 4]

Every fourth round fired will emit a visible red tracer.[CfgMa 5] The last four rounds of the magazine will always emit visible tracers.[CfgMa 6]

32Rnd. MPU SMG Mag (Tracer)[]

Arma3-ammunition-sogpf32rndmpu

Alternate 32-rounder magazine loaded entirely with 9 mm red tracer ammunition.[CfgMa 7][CfgMa 8]

Magazine compatibility[]

Weapon name
(Classname)		 32Rnd. MPU SMG Mag
 32Rnd. MPU SMG Mag (Tracer)
MPU
(vn_mpu)		 ✔ ✔


Trivia[]

  • The MPU was not initially available upon launch and was only added after the release of Update 1.1.[1]
  • Prior to Update 1.2, the MPU lacked distant sound shader effects and would not be audible to human players at extreme ranges.[2]
    • The patch also increased its weight from its original of 23 "mass" units and corrected a minor visual glitch on the MPU's model. Before the patch, the MPU's front sight post had a small gap that could be seen in first person.[2]

Gallery[]

Config/script references[]

CfgAmmo

  1. ↑ CfgAmmo >> vn_melee_stun >> hit
  2. ↑ CfgAmmo >> vn_9x19 >> hit
  3. ↑ CfgAmmo >> vn_9x19 >> airFriction
  4. ↑ CfgAmmo >> vn_9x19 >> typicalSpeed
  5. ↑ CfgAmmo >> vn_9x19 >> caliber
  6. ↑ CfgAmmo >> vn_9x19 >> deflecting

CfgMagazines

  1. ↑ CfgMagazines >> vn_mpu_mag >> count
  2. ↑ 2.0 2.1 CfgMagazines >> vn_mpu_mag >> initSpeed
  3. ↑ CfgMagazines >> vn_mpu_mag >> mass
  4. ↑ CfgMagazines >> vn_mpu_mag >> ammo >> "vn_9x19"
  5. ↑ CfgMagazines >> vn_mpu_mag >> tracersEvery
  6. ↑ CfgMagazines >> vn_mpu_mag >> lastRoundsTracer
  7. ↑ CfgMagazines >> vn_mpu_t_mag >> tracersEvery
  8. ↑ CfgMagazines >> vn_mpu_t_mag >> lastRoundsTracer

CfgWeapons

  1. ↑ CfgWeapons >> vn_mpu >> FullAuto >> dispersion
  2. ↑ CfgWeapons >> vn_mpu >> Single >> dispersion
  3. ↑ CfgWeapons >> vn_mpu >> WeaponSlotsInfo >> mass
  4. ↑ CfgWeapons >> vn_mpu >> recoil
  5. ↑ CfgWeapons >> vn_mpu >> recoilProne
  6. ↑ CfgWeapons >> vn_mpu >> inertia
  7. ↑ CfgWeapons >> vn_mpu >> dexterity
  8. ↑ CfgWeapons >> vn_mpu >> FullAuto >> reloadTime
  9. ↑ CfgWeapons >> vn_mpu >> WeaponSlotsInfo >> MuzzleSlot >> compatibleItems[] >> {"vn_s_mpu"}
  10. ↑ CfgWeapons >> vn_mpu >> discreteDistance[] >> {100,200}
  11. ↑ CfgWeapons >> vn_mpu >> discreteDistanceInitIndex >> "0"
  12. ↑ CfgWeapons >> vn_mpu >> magazines[] >> {"vn_mpu_mag","vn_mpu_t_mag"}

Scripts

  1. ↑ \vn\functions_f_vietnam\functions\melee\fn_melee_drainstamina.sqf

Formulae

  1. ↑ 60 / reloadTime = 60 / 0.098
  2. ↑ (mass * 0.04) * dexterity = (35 * 0.04) * 1.75
  3. ↑ initSpeed * caliber * 15 / 1000 = 390 * 0.8 * 15 / 1000

Notes[]

  1. ↑ The MPU's muzzle velocity is determined by the magazine's initSpeed value rather than the weapon itself (the weapon class initSpeed is set to a value of zero).
  2. ↑ Damage will be reduced if the projectile's velocity drops below this value.

References[]

  1. ↑ Graham, R et al. 2021, S.O.G. Prairie Fire - Changelog, Bohemia Interactive Forums, viewed 11 December 2023, <https://forums.bohemia.net/forums/topic/234698-sog-prairie-fire-changelog/?do=findComment&comment=3447057>.
  2. ↑ 2.0 2.1 Graham, R et al. 2022, S.O.G. Prairie Fire - Changelog, Bohemia Interactive Forums, viewed 11 December 2023, <https://forums.bohemia.net/forums/topic/234698-sog-prairie-fire-changelog/?do=findComment&comment=3463284>.

External links[]

See also[]

Weapons of comparable role and configuration[]

  • MC-10 (Factionless counterpart)
  • VZ.61 (Alternate 7.65 mm-chambered factionless counterpart)
Weapons of S.O.G. Prairie Fire
Handguns .38 Revolver • HD .22 • HP 9 mm • M712 7.62 mm • M1895 7.62 mm • M1911 .45 • Mk1 UDG 2.54 mm • Mk22 Mod 0 9 mm • Model 10 .38 • P38 9 mm • PM 9 mm • PPK 9 mm • TT-33 7.62 mm • Type 64 Pistol 7.65 mm • Welrod 7.65 mm
Submachine guns F1 SMG 9 mm • L2A3 9 mm (L34A1, L34A1 XM148) • M/45 9 mm • M1A1 Tommy Gun .45 (Shorty, M1928, M1928A1) • M3A1 Grease Gun .45 • MAT-49 9 mm (VC) • MC-10 9 mm • MP40 9 mm • MPU 9 mm • PPS-43 7.62 mm (PPS-52) • PPSh-41 7.62 mm (K-50M) • Sten Mk.II 9 mm • Type 64 SMG 7.65 mm • VZ.61 7.65 mm
Shotguns ISh-54 (Sawn-off, Sidearm) • M1897
Carbines GAU-5A/A 5.56 mm • M1 Carbine 7.62 mm (M1 Rifle Grenade, M2, M2 Rifle Grenade, M3) • SKS 7.62 mm (GL) • XM177E1 5.56 mm (E2, E2 Foregrip, E2 Stock, E2 Short, E2 XM148)
Rifles/Assault rifles AK 7.62 mm • K98K 7.92 mm • KBKG 7.62 mm (Rifle Grenade) • L1A1 7.62 mm (XM148, Rifle Grenade, SAS) • M1 Garand 7.62 mm (Rifle Grenade) • M16A1 5.56 mm (M203, XM148, E1, E1 XM148, USAF) • M1903 7.62 mm (Rifle Grenade) • M36 7.5 mm • M38 7.62 mm • M49/56 7.5 mm (Rifle Grenade) • M63A 5.56 mm • Type 56 7.62 mm
Squad automatic weapons DP-27 7.62 mm • L2A1 LMG 7.62 mm • L4 LMG 7.62 mm • M1918A2 7.62 mm • M63A LMG 5.56 mm (Commando) • RPD 7.62 mm (El Cid, Shorty)
Machineguns M60 7.62 mm (Shorty) • MG42 7.92 mm • PK 7.62 mm
Designated marksman rifles M14 7.62 mm (A1, Shorty) • M1891 7.62 mm
Sniper rifles M40 7.62 mm • M91/30 7.62 mm • SVD 7.62 mm • VZ54 7.62 mm • XM21 7.62 mm
Grenade launchers M79 (Sawn-off)
Launchers 9K32 Strela-2 (M) • B40 • B41 • M127 Flare Launcher • M20A1B1 • M72 LAW
Static 9P111 Malyutka • BGM-71 TOW • D44 • DP-27 • DShKM • H12 Rocket Launcher • L/70 Mk2 • M2 Mortar • M2HB • M1910 • M29 Mortar • M40A1 Recoilless Rifle • M45 Quadmount • M60 • M101 Howitzer • M1919A4 (M1919A6) • MG42 • Mk18 Mod 0 • PK • RPD • SGM • Spiderhole • Type 53 Mortar • Type 56 Recoilless Rifle • Type 63 Mortar • ZGU-1 • ZPU-4
(Parenthesis) denote variants.
MACV/CIA/MEDT - Armoury (S.O.G. Prairie Fire)
Handguns .38 Revolver • HP 9 mm§ • M1911 .45 • Mk1 UDG 2.54 mm • Mk22 Mod 0 9 mm • Model 10 .38 • P38 9 mm§ • PPK 9 mm§ • Welrod 7.65 mm
Submachine guns L34A1 9 mm§ • M/45 9 mm • M1A1 Tommy Gun .45 (Shorty*) • M3A1 Grease Gun .45 • MAT-49 9 mm • MPU 9 mm* • Sten Mk.II 9 mm • Type 64 SMG 7.65 mm§
Shotguns M1897
Carbines M1 Carbine 7.62 mm (M1 Rifle Grenade, M2*, M2 Rifle Grenade, M3) • XM177E1 5.56 mm (E2, E2 Foregrip, E2 Stock§, E2 Short, E2 XM148)
Rifles/Assault rifles M1 Garand 7.62 mm (Rifle Grenade) • M16A1 5.56 mm (M203§, XM148, E1) • M63A 5.56 mm • Type 56 7.62 mm*
Squad automatic weapons M1918A2 7.62 mm • M63A LMG 5.56 mm (Commando) • RPD 7.62 mm (El Cid)
Machineguns M60 7.62 mm (Shorty)
Designated marksman rifles M14 7.62 mm (A1, Shorty§)
Sniper rifles M40 7.62 mm • XM21 7.62 mm
Grenade launchers M79 (Sawn-off)
Launchers B40 • M127 Flare Launcher • M72 LAW§
Static BGM-71 TOW • L/70 Mk2 • M2 Mortar • M2HB • M29 Mortar • M40A1 Recoilless Rifle • M45 Quadmount • M60 • M101 Howitzer • M1919A4 (M1919A6) • Mk18 Mod 0
(Parenthesis) denote variants.
* denotes weapons also used or are exclusive to the CIA sub-faction.
§ denotes weapons also used or are exclusive to the MEDT sub-faction.
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