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The TRs 301 is an assault rifle that appears in S.T.A.L.K.E.R.: Lost Alpha and S.T.A.L.K.E.R.: Shadow of Chernobyl.


A light rifle with an effective fire range of up to 300 meters. Due its to exceptionally easy triggering, high ergonomics and low weight, the weapon is highly accurate, though it is too sensitive to dirt and is not always suitable for use under difficult field conditions.
- Inventory description

Overview Edit

Upgrades Edit

Lost Alpha Edit

List of upgrades
Level 1 upgrades.

Stop drive:

  • Price: 3000 RU
  • A synthetic part installed behind the end of the step slide compresses it to increase accuracy.
    • Accuracy: +17%

Forced cooling:

  • Price: 3000 RU
  • A slide that directs the flow of air through the rifling to cool the weapon.
    • Rate of fire: +23%


Level 2 upgrades. Balancing parts:

  • Price: 3000 RU
  • Polymer parts which rigidly fix spring trajectory, reducing the sway.
    • Accuracy: +14%

Rollback moderator:

  • Price: 3000 RU
  • Special slide parts compensate the movement of the slide, reducing recoil.
    • Recoil: +73%

Titanium spring return mechanism:

  • Price: 3720 RU
  • Titanium springs are much more efficient than steel ones,
    • Rate of fire: +3%

Integral slide:

  • Price: 3360 RU
  • This modification is not cheap, but it is certainly a future standard for next generation weapons.
    •  ?


Level 3 upgrades. Smoothing spray application:

  • Price: 3840
  • The spray smooth out minor flaws in weapon mechanics, significantly increasing muzzle velocity.
    • Accuracy: +9%

Ergonomically shaped receiver:

  • Price: 3840 RU
  • A more convenient shape of the grip makes handling the weapon more comfortable, especially when firing on the move.
    • Handling: +18%

Receiver counterforce rotator:

  • Price: 3600 RU
  • A counterforce rotator installed in the receiver reduces weapon recoil.
    • Recoil: +48%

Amortization of return mechanism:

  • Price: 3840 RU
  • Installing seals on the moving parts of the machinery will help to maximally stabilize the barrel when firing.
    • Handling: +14%

Duplicated guides and fighting springs:

  • Price: 3840 RU
  • A replacement of the basic return mechanism with a more powerful one, with two guiding rods and return springs, which grants an increase in the rate of fire.
    •  ?

Expanded magazine:

  • Price: 4200 RU
  • Change the standard magazines for larger ones.
    • Magazine: +10

Gas piston installation:

  • Price: 3600 RU
  • With the installation of a gas piston, gases crease to go back directly into the receiver, which noticeably reduces weapon wear.
    • Improves weapon's durability.

Impact-resistant polymer frame:

  • Price: 3780 RU
  • Replacing the base frame with a polymer one can reduce the mass of the weapon without compromising its reliability.
    • Weight: -0.70kg

Developer's Cut Edit

List of upgrades
ID Icon Upgrade Description
Cost Effect Requirements
1A Ui inGame2 upgrade TRs 301 1 Integral slide This modification is not cheap, but it is certainly a future standard for next generation weapons.
1050 RU

Reliability +15%

Tools for rough work (v1.4005+)

1C Ui inGame2 upgrade TRs 301 2 Gas energy redirection Reducing the diameter of the gas chamber with synthetic sealants significantly increases the muzzle velocity.
1600 RU

Bullet velocity +15%

1D Ui inGame2 upgrade TRs 301 3 Forced cooling A slide that directs the flow of air through the rifling to cool the weapon.
1600 RU

Rate of fire +10%

1E Ui inGame2 upgrade TRs 301 4 Gas piston installation With the installation of a gas piston, gases cease to go back directly into the receiver, which noticeably reduces weapon wear.
1860 RU

Reliability +20%

2A Ui inGame2 upgrade TRs 301 5 Receiver counterforce rotator A counterforce rotator installed in the receiver reduces weapon recoil.
1050 RU

Recoil -15%

Tools for rough work (v1.4005+)

2C Ui inGame2 upgrade TRs 301 6 Automatic two-position gas regulator This special mechanism reduces the weapon's sway, increasing accuracy.
1500 RU

Reliability +15%

2E Ui inGame2 upgrade TRs 301 7 Rollback moderator Special slide parts compensate the movement of the slide, reducing recoil.
1850 RU

Recoil -30%

2F Ui inGame2 upgrade TRs 301 8 Stop drive A synthetic part installed behind the end of the step slide compresses it to increase accuracy.
1900 RU

Accuracy +20%

3A Ui inGame2 upgrade TRs 301 9 Amortization of return mechanism Installing seals on the moving parts of machinery will help to maximally stabilize the barrel when firing.
1100 RU

Handling +15%


3C Ui inGame2 upgrade TRs 301 10 Balancing parts Polymer parts which rigidly fix spring trajectory, reducing the sway.
1600 RU

Accuracy +20%

3D Ui inGame2 upgrade TRs 301 11 Titanium spring return mechanism Titanium springs are much more efficient than steel ones.
1600 RU

Rate of fire +10%

3E Ui inGame2 upgrade TRs 301 12 Duplicated guides and fighting springs A replacement of the basic return mechanism with a more powerful one, with two guiding rods and return springs, which grants an increase in the rate of fire.
1900 RU

Rate of fire +20%

4A Ui inGame2 upgrade TRs 301 13 Impact-resistant polymer frame Replacing the base frame with a polymer one can reduce the mass of the weapon without compromising its reliability.
700 RU

Weight -0.5 kg


4C Ui inGame2 upgrade TRs 301 14 Ergonomically shaped receiver A more convenient shape of the grip makes handling the weapon more comfortable, especially when firing on the move.
1600 RU

Handling +25%

4E Ui inGame2 upgrade TRs 301 15 Hollow grip with stabilizer A stabilizer is installed inside the hollow grip, reducing recoil.
1550 RU

Handling +25%

4F Ui inGame2 upgrade TRs 301 16 Smoothing spray application The spray smooths out minor flaws in weapon mechanics, significantly increasing muzzle velocity.
1860 RU

Bullet velocity +25%

5A Ui inGame2 upgrade TRs 301 17 Expanded magazine Change standard magazines for larger ones.
1790 (1690 v1.4007) RU

Mag. size +10


Notes Edit

  • Can be equipped with the M203 grenade launcher.
  • Can be equipped with a silencer.
  • Does not need to be upgraded in order to use any of its attachments.
  • Weapon is not changed by the v1.4007 PRM Weapons Pack.
  • Aquisition
These are the easily obtained instances, early in the game. Several placements might be found in stashes, but the coordinates for these stashes are frequently storyline dependent.

Gallery Edit