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The UDP Compact is a pistol that appears in S.T.A.L.K.E.R.: Lost Alpha and S.T.A.L.K.E.R.: Shadow of Chernobyl.


A reliable weapon. As a quality compact close-range weapon, it is very popular among the Zone veterans.
- Inventory description

Overview

Upgrades

Lost Alpha

List of upgrades
Level 1 upgrades.

More mobile slide:

  • Price: 900 RU
  • Extending the course of the slide and strengthening the retracting mechanism, makes it possible to positively affect bullet trajectory.
    • Accuracy: +35%

Expanded magazine:

  • Price: 900 RU
  • Increased capacity of the internal magazine.
  • Magazine: +8

Level 2 upgrades. Double action trigger:

  • Price: 1032 RU
  • The trigger is automatically cocking the weapon, increasing accuracy.
    • Accuracy: +5%

Chromed insides:

  • Price: 1032 RU
  • Chromium helps improve the durability of the weapon.
    • Improves weapon's durability.

Full auto mode:

  • Price: 1032 RU
  • When reassembled and retuned, the weapon can fire full auto..
    • Allows full auto mode of fire.
    • Handling: +9%
    • Recoil: -61%

Mobile slide segment:

  • Price: 1020 RU
  • A new slide segment provides increased rate of fire, without overloading other parts of the weapon.
    • Rate of fire: -2%

Level 3 upgrades. Auxiliary slide chamber:

  • Price: 1140 RU
  • An auxiliary chamber to the main blowback device reduces the amount of force needed to move the slide increasing accuracy.
    • Accuracy: +8%

Modular firing mechanism:

  • Price: 1056 RU
  • Modular firing mechanism ensures easy maintenance and replacement parts, as well as greater convenience in the use of arms.
    •  ?

Titanium receiver:

  • Price: 1032 RU
  • An almost indestructible receiver allows the weapon to serve much longer.
    • Improves weapon's durability.

Polymer buffer compensator:

  • Price: 1056 RU
  • A small polymer buffer distributes a part of the recoil.
    • Recoil: -63%

Sinusoidal rifling:

  • Price: 1104 RU
  • Sinusoidal rifling can improve its cooling and increase the rate without losing the muzzle velocity tractors flying bullets.
    • Rate of fire: +5%

Removable grip back plate:

  • Price: 1140 RU
  • A special grip shape, optimized with a mobile back plate.
    • Recoil: +57%

Barrel with simplified rifling:

  • Price: 1056 RU
  • Simplified, shallow rifling can increase the rate of fire, which is important in close quarters combat with the enemy.
    • Rate of fire: +0%

Padded grip:

  • Price: 1050 RU
  • A padded grip makes the recoil less tangible.
    • Recoil: -63%

Developer's Cut

List of upgrades
ID Icon Upgrade Description
Cost Effect Requirements
1A Ui inGame2 upgrade UDP compact 1.png Mobile slide segment A new slide segment provides increased rate of fire, without overloading other parts of the weapon.
900 RU

Rate of fire +20%

Tools for rough work (v1.4005+)

1C Ui inGame2 upgrade UDP compact 2.png Polymer buffer compensator A small polymer buffer distributes a part of the recoil.
1600 RU

Recoil -20%

1D Ui inGame2 upgrade UDP compact 3.png More mobile slide Extending the course of the slide and strengthening the retracting mechanism, makes it possible to positively affect bullet trajectory.
1600 RU

Bullet velocity +20%

1E Ui inGame2 upgrade UDP compact 4.png Full auto mode When reassembled and retuned, the weapon can fire full auto..
4500 (v1.4005) / 3300 (v1.4007) RU

Full auto fire mode

2A Ui inGame2 upgrade UDP compact 5.png Longer barrel By replacing the standard barrel with a longer one, growing flat trajectory bullets.
900 RU

Bullet velocity +20%

Tools for rough work (v1.4005+)

2C Ui inGame2 upgrade UDP compact 6.png Barrel with simplified rifling Simplified, shallow rifling can increase the rate of fire, which is important in close quarters combat with the enemy.
1600 RU

Rate of fire +20%

2D Ui inGame2 upgrade UDP compact 7.png Chromed insides Chromium helps improve durability of the barrel of the weapon.
1600 RU

Reliability +20%

2E Ui inGame2 upgrade UDP compact 8.png Sinusoidal rifling Sinusoidal rifling can improve its cooling and increase the rate without losing the muzzle velocity tractors flying bullets.
2200 RU

Rate of fire +30%

3A Ui inGame2 upgrade UDP compact 9.png Titanium receiver An almost indestructible receiver allows the weapon to serve much longer.
1000 RU

Reliability +20%

Tools for rough work (v1.4005+)

3C Ui inGame2 upgrade UDP compact 10.png Grip with a straightened rear A more ergonomically shaped grip with a modified rear.
1650 RU

Handling +40%

3D Ui inGame2 upgrade UDP compact 11.png Padded grip A padded grip makes the recoil less tangible.
1650 RU

Recoil -20%

3E Ui inGame2 upgrade UDP compact 12.png Removable grip back plate A special grip shape, optimized with a mobile back plate.
2200 RU

Recoil -30%

4A Ui inGame2 upgrade UDP compact 13.png Double action trigger The trigger is automatically cocking the weapon, increasing accuracy.
900 RU

Accuracy +20%

Tools for rough work (v1.4005+)

4C Ui inGame2 upgrade UDP compact 14.png Modular firing mechanism Modular firing mechanism ensures easy maintenance and replacement parts, as well as greater convenience in the use of arms.
1600 RU

Reliability +20%

4E Ui inGame2 upgrade UDP compact 15.png Auxiliary slide chamber An auxiliary chamber to the main blowback device reduces the amount of force needed to move the slide, increasing accuracy.
2200 RU

Accuracy +40%

5A Ui inGame2 upgrade UDP compact 16.png Expanded magazine Increased capacity of the internal magazine.
2400 (v1.4005) / 1900 (v1.4007) RU

Mag. size +4 (v1.4005) / +6 (v1.4007)


Notes

  • Weapon does not need to be upgraded in order to attach a silencer.
  • Weapon is not changed by the v1.4007 PRM Weapons Pack.

Trivia

Gallery

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