diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/Blu43Entity.java b/src/main/java/com/atsuishio/superbwarfare/entity/Blu43Entity.java
index 3daccdcec..38ff1a6e6 100644
--- a/src/main/java/com/atsuishio/superbwarfare/entity/Blu43Entity.java
+++ b/src/main/java/com/atsuishio/superbwarfare/entity/Blu43Entity.java
@@ -54,7 +54,9 @@ public class Blu43Entity extends Entity implements GeoEntity, OwnableEntity {
 
     public Blu43Entity(LivingEntity owner, Level level) {
         super(ModEntities.BLU_43.get(), level);
-        this.setOwnerUUID(owner.getUUID());
+        if (owner != null) {
+            this.setOwnerUUID(owner.getUUID());
+        }
     }
 
     @Override
diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/ClaymoreEntity.java b/src/main/java/com/atsuishio/superbwarfare/entity/ClaymoreEntity.java
index c08779732..6cb81afaa 100644
--- a/src/main/java/com/atsuishio/superbwarfare/entity/ClaymoreEntity.java
+++ b/src/main/java/com/atsuishio/superbwarfare/entity/ClaymoreEntity.java
@@ -55,7 +55,9 @@ public class ClaymoreEntity extends Entity implements GeoEntity, OwnableEntity {
 
     public ClaymoreEntity(LivingEntity owner, Level level) {
         super(ModEntities.CLAYMORE.get(), level);
-        this.setOwnerUUID(owner.getUUID());
+        if (owner != null) {
+            this.setOwnerUUID(owner.getUUID());
+        }
     }
 
     @Override
diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/Tm62Entity.java b/src/main/java/com/atsuishio/superbwarfare/entity/Tm62Entity.java
index 97d29c85b..7be9e7a25 100644
--- a/src/main/java/com/atsuishio/superbwarfare/entity/Tm62Entity.java
+++ b/src/main/java/com/atsuishio/superbwarfare/entity/Tm62Entity.java
@@ -55,7 +55,9 @@ public class Tm62Entity extends Entity implements GeoEntity, OwnableEntity {
 
     public Tm62Entity(LivingEntity owner, Level level, boolean fuse) {
         super(ModEntities.TM_62.get(), level);
-        this.setOwnerUUID(owner.getUUID());
+        if (owner != null) {
+            this.setOwnerUUID(owner.getUUID());
+        }
         this.entityData.set(FUSE, fuse);
     }
 
diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/projectile/C4Entity.java b/src/main/java/com/atsuishio/superbwarfare/entity/projectile/C4Entity.java
index 614932286..99ce97c93 100644
--- a/src/main/java/com/atsuishio/superbwarfare/entity/projectile/C4Entity.java
+++ b/src/main/java/com/atsuishio/superbwarfare/entity/projectile/C4Entity.java
@@ -70,13 +70,14 @@ public class C4Entity extends Entity implements GeoEntity, OwnableEntity {
     }
 
     public C4Entity(LivingEntity owner, Level level) {
-        super(ModEntities.C_4.get(), level);
-        this.setOwnerUUID(owner.getUUID());
+        this(owner, level, false);
     }
 
     public C4Entity(LivingEntity owner, Level level, boolean isControllable) {
         super(ModEntities.C_4.get(), level);
-        this.setOwnerUUID(owner.getUUID());
+        if (owner != null) {
+            this.setOwnerUUID(owner.getUUID());
+        }
         this.entityData.set(IS_CONTROLLABLE, isControllable);
     }
 
diff --git a/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/LaserTowerEntity.java b/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/LaserTowerEntity.java
index dba03447e..642671cba 100644
--- a/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/LaserTowerEntity.java
+++ b/src/main/java/com/atsuishio/superbwarfare/entity/vehicle/LaserTowerEntity.java
@@ -70,7 +70,9 @@ public class LaserTowerEntity extends EnergyVehicleEntity implements GeoEntity,
 
     public LaserTowerEntity(LivingEntity owner, Level level) {
         super(ModEntities.LASER_TOWER.get(), level);
-        this.setOwnerUUID(owner.getUUID());
+        if (owner != null) {
+            this.setOwnerUUID(owner.getUUID());
+        }
     }
 
     public boolean isOwnedBy(LivingEntity pEntity) {