Lost Alpha Wiki

The SR-25 is a new sniper rifle that appears in S.T.A.L.K.E.R.: Lost Alpha of 1.4007 version with the PRM Weapon Pack MOD from Lost Alpha Official channel.



  • The SR-25 (Stoner Rifle-25) is a designated marksman rifle designed by Eugene Stoner and manufactured by Knight's Armament Company.


  • Standard 7.62x51mm NATO
  • Armour-piercing 7.62x51mm AP

Upgrades (PRM Weapon Pack v2.11)

Level 1 Upgrades

Longitudinal Grooves

  • Price:
  • Adding oblique grooves to the frame of the weapon helps reduce friction of moving parts and protects them from dirt, increasing weapon reliability.
    • Reliability +20%

Receiver counterforce rotator

  • Price:
  • A counterforce rotator installed in the receiver reduces weapon recoil.
    • Recoil -25%


Inertia moderator

  • Price:
  • Installed on the back of the receiver, this modification slows down the slide, increasing the weapon's accuracy.
    • Accuracy +25%

Stop Drive

  • Price:
  • A synthetic part installed behind the end of the step slide, compresses it to increase accuracy.
    • Accuracy +30%


Accelerated refire rate

  • Price:
  • Despite its name, it replaces the regular bolt with an exposed bolt system: it should provide a higher rate of fire.
    • Rate of Fire +30%

Level 2 Upgrades

Slide protective coating

  • Price:
  • A protective coating increases the tightness of the receiver box, which positively affects reliability.
    • Reliability +20%

Ergonomically shaped receiver

  • Price:
  • A more convenient shape of the grip makes handling the weapon more comfortable, especially when firing on the move.
    • Handling +30%


Smoothing spray application

  • Price:
  • The spray smooths out minor flaws in weapon mechanics, significantly increasing muzzle velocity.
    • Bullet velocity +15%

Additional rifling

  • Price:
  • Installing a barrel with additional rifling increases the velocity and accuracy of the weapons.
    • Bullet velocity +20%


Incident slide

  • Price:
  • This slide slides along the stem, preventing the muzzle from climbing when firing.
    • Recoil -30%

Additional Upgrades

Expanded magazine

  • Price:
  • Change standard magazines for larger ones.
    • Mag size +10

Impact-resistant polymer frame

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



  • The weapon's description is directly copied from wikipedia.
  • Despite its name as 'SR-25', the actual world model and specification of the weapon closely refers to the shorter Mk 11 Mod 0 variant.