diff --git a/Resources/Prototypes/Corvax/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/SMGsAmmo.yml b/Resources/Prototypes/Corvax/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/SMGsAmmo.yml
index f1f29cea202..3827f165ea7 100644
--- a/Resources/Prototypes/Corvax/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/SMGsAmmo.yml
+++ b/Resources/Prototypes/Corvax/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/SMGsAmmo.yml
@@ -9,6 +9,8 @@
       types:
         Piercing: 5
         Blunt: 4
+    penetrationProb: 0.06  #CorvaxFrontier
+    penetrationScore: 1
 
 - type: entity #FrontierCorvax
   id: BulletVector22Incendiary
@@ -57,6 +59,7 @@
       types:
         Piercing: 17
         Blunt: 6
+    penetrationProb: 0.51  #CorvaxFrontier
     penetrationScore: 1
 
 - type: entity #FrontierCorvax
@@ -94,6 +97,8 @@
         Piercing: 6
         Blunt: 3
         Radiation: 14
+    penetrationProb: 0.23  #CorvaxFrontier
+    penetrationScore: 1
 
 - type: entity
   id: BulletVector45AP
@@ -106,5 +111,6 @@
       types:
         Piercing: 12
         Blunt: 3        # 20% decrease
-    penetrationScore: 2
+    penetrationProb: 0.69  #CorvaxFrontier
+    penetrationScore: 1
     ignoreResistances: true
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/antimateriel.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/antimateriel.yml
index be73011e777..21aeef5926f 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/antimateriel.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/antimateriel.yml
@@ -9,6 +9,7 @@
       types:
         Piercing: 40
         Structural: 30
+    penetrationProb: 1  #CorvaxFrontier
     penetrationScore: 3
   - type: StaminaDamageOnCollide
     damage: 35
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/caseless_rifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/caseless_rifle.yml
index 5ce0bf82fe9..35de0b52451 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/caseless_rifle.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/caseless_rifle.yml
@@ -5,6 +5,8 @@
   noSpawn: true
   components:
   - type: Projectile
+    penetrationProb: 0.19  #CorvaxFrontier
+    penetrationScore: 1
     damage:
       types:
         Piercing: 19
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/heavy_rifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/heavy_rifle.yml
index 921cbc8d4ad..4b0343a33f8 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/heavy_rifle.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/heavy_rifle.yml
@@ -8,6 +8,7 @@
     damage:
       types:
         Piercing: 19
+    penetrationProb: 0.53  #CorvaxFrontier
     penetrationScore: 1
 
 - type: entity
@@ -20,4 +21,5 @@
     damage:
       types:
         Piercing: 5
+    penetrationProb: 0.04  #CorvaxFrontier
     penetrationScore: 1
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/light_rifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/light_rifle.yml
index b69efdb1aa6..575457e2c84 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/light_rifle.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/light_rifle.yml
@@ -1,6 +1,6 @@
 - type: entity
   id: BulletLightRifle
-  name: bullet (.20 rifle)
+  name: bullet (.30 rifle)
   parent: BaseBullet
   noSpawn: true
   components:
@@ -8,11 +8,12 @@
     damage:
       types:
         Piercing: 19
+    penetrationProb: 0.53  #CorvaxFrontier
     penetrationScore: 1
 
 - type: entity
   id: BulletLightRiflePractice
-  name: bullet (.20 rifle practice)
+  name: bullet (.30 rifle practice)
   parent: BaseBulletPractice
   noSpawn: true
   components:
@@ -23,7 +24,7 @@
 
 - type: entity
   id: BulletLightRifleRubber
-  name: bullet (.20 rifle rubber)
+  name: bullet (.30 rifle rubber)
   parent: BaseBulletRubber
   noSpawn: true
   components:
@@ -35,7 +36,7 @@
 - type: entity
   id: BulletLightRifleIncendiary
   parent: BaseBulletIncendiary
-  name: bullet (.20 rifle incendiary)
+  name: bullet (.30 rifle incendiary)
   noSpawn: true
   components:
   - type: Projectile
@@ -47,7 +48,7 @@
 - type: entity
   id: BulletLightRifleUranium
   parent: BaseBulletUranium
-  name: bullet (.20 rifle uranium)
+  name: bullet (.30 rifle uranium)
   noSpawn: true
   components:
   - type: Projectile
@@ -55,4 +56,5 @@
       types:
         Radiation: 9
         Piercing: 10
+    penetrationProb: 0.24  #CorvaxFrontier
     penetrationScore: 1
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/magnum.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/magnum.yml
index 84a079ff765..5a38e21ccab 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/magnum.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/magnum.yml
@@ -8,7 +8,8 @@
     damage:
       types:
         Piercing: 35
-    penetrationScore: 1
+    penetrationProb: 0.56  #CorvaxFrontier
+    penetrationScore: 2
 
 - type: entity
   id: BulletMagnumPractice
@@ -56,7 +57,8 @@
     damage:
       types:
         Piercing: 26 # 20% decrease
-    penetrationScore: 2
+    penetrationProb: 0.9  #CorvaxFrontier
+    penetrationScore: 1
     ignoreResistances: true
 
 - type: entity
@@ -70,4 +72,5 @@
       types:
         Radiation: 15
         Piercing: 20
+    penetrationProb: 0.32  #CorvaxFrontier
     penetrationScore: 1
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/pistol.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/pistol.yml
index 086a8dc914f..49f82bc3ddb 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/pistol.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/pistol.yml
@@ -8,6 +8,8 @@
     damage:
       types:
         Piercing: 16
+    penetrationProb: 0.13  #CorvaxFrontier
+    penetrationScore: 1
 
 - type: entity
   id: BulletPistolPractice
@@ -54,3 +56,5 @@
       types:
         Radiation: 6
         Piercing: 10
+    penetrationProb: 0.07  #CorvaxFrontier
+    penetrationScore: 1
\ No newline at end of file
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/rifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/rifle.yml
index 99278c99b5a..d7d7d18e9f9 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/rifle.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/rifle.yml
@@ -8,6 +8,7 @@
     damage:
       types:
         Piercing: 17
+    penetrationProb: 0.38  #CorvaxFrontier
     penetrationScore: 1
 
 - type: entity
@@ -55,4 +56,5 @@
       types:
         Radiation: 7
         Piercing: 8
-    penetrationScore: 1
+    penetrationProb: 0.2  #CorvaxFrontier
+    penetrationScore: 1
\ No newline at end of file
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/shotgun.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/shotgun.yml
index fff384c2144..aabc29c05d4 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/shotgun.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/shotgun.yml
@@ -11,6 +11,7 @@
     damage:
       types:
         Piercing: 28
+    penetrationProb: 0.62  #CorvaxFrontier
     penetrationScore: 2
 
 - type: entity
@@ -42,7 +43,6 @@
     damage:
       types:
         Piercing: 10
-    penetrationScore: 1
 
 - type: entity
   id: PelletShotgunIncendiary
@@ -179,7 +179,6 @@
       types:
         Radiation: 5
         Piercing: 5
-    penetrationScore: 1
 
 - type: entity
   id: PelletGrapeshot #tally fucking ho