diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 7f57e40..ecd8249 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -487,7 +487,13 @@ void Human::Shot(a8::Vec2& target_dir, bool& shot_ok)
         }
         bullet_dir.Rotate(bullet_angle / 180.0f);
         room->frame_event.AddBullet(this, bullet_born_pos, bullet_dir, fly_distance);
-        room->CreateBullet(this, curr_weapon, bullet_born_pos, bullet_dir, fly_distance);
+        room->CreateBullet(this,
+                           curr_weapon->meta,
+                           curr_weapon->GetUpgradeMeta(),
+                           curr_weapon->bullet_meta,
+                           bullet_born_pos,
+                           bullet_dir,
+                           fly_distance);
     }
     --curr_weapon->ammo;
     int slot_id = curr_weapon->meta->i->_inventory_slot();
@@ -581,7 +587,14 @@ void Human::TankShot(a8::Vec2& target_dir)
         bullet_dir.Rotate(bullet_angle / 180.0f);
         room->frame_event.AddBullet(this, bullet_born_pos, bullet_dir, fly_distance);
         if (room->BattleStarted()) {
-            room->CreateBullet(this, &tank_weapon, bullet_born_pos, bullet_dir, fly_distance, true);
+            room->CreateBullet(this,
+                               tank_weapon.meta,
+                               tank_weapon.GetUpgradeMeta(),
+                               tank_weapon.bullet_meta,
+                               bullet_born_pos,
+                               bullet_dir,
+                               fly_distance,
+                               true);
         }
     }
     --tank_weapon.ammo;
diff --git a/server/gameserver/player.cc b/server/gameserver/player.cc
index dc22641..cbd6f68 100644
--- a/server/gameserver/player.cc
+++ b/server/gameserver/player.cc
@@ -383,7 +383,13 @@ void Player::Shot()
             }
             room->frame_event.AddBullet(this, bullet_born_pos, bullet_dir, fly_distance);
             if (room->BattleStarted()) {
-                room->CreateBullet(this, curr_weapon, bullet_born_pos, bullet_dir, fly_distance);
+                room->CreateBullet(this,
+                                   curr_weapon->meta,
+                                   curr_weapon->GetUpgradeMeta(),
+                                   curr_weapon->bullet_meta,
+                                   bullet_born_pos,
+                                   bullet_dir,
+                                   fly_distance);
             }
         }
     } else {
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index c4a2263..f2b8c1a 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -483,16 +483,22 @@ int Room::CreateLoot(int equip_id, a8::Vec2 pos, int count, int equip_lv)
     }
 }
 
-void Room::CreateBullet(Human* hum, Weapon* weapon,
-                        a8::Vec2 pos, a8::Vec2 dir, float fly_distance, bool is_tank_skin)
+void Room::CreateBullet(Human* hum,
+                        MetaData::Equip* weapon_meta,
+                        MetaData::EquipUpgrade* weapon_upgrade_meta,
+                        MetaData::Equip* bullet_meta,
+                        a8::Vec2 pos,
+                        a8::Vec2 dir,
+                        float fly_distance,
+                        bool is_tank_skin)
 {
     if (grid_service->CanAdd(pos.x, pos.y)) {
         Bullet* bullet = EntityFactory::Instance()->MakeBullet(AllocUniid());
         bullet->player = hum;
         bullet->room = this;
-        bullet->gun_meta = weapon->meta;
-        bullet->gun_upgrade_meta = weapon->GetUpgradeMeta();
-        bullet->meta = MetaMgr::Instance()->GetEquip(weapon->meta->i->use_bullet());
+        bullet->gun_meta = weapon_meta;
+        bullet->gun_upgrade_meta = weapon_upgrade_meta;
+        bullet->meta = bullet_meta;
         bullet->SetPos(pos);
         bullet->dir = dir;
         bullet->born_pos = pos;
diff --git a/server/gameserver/room.h b/server/gameserver/room.h
index 591fe85..f778585 100644
--- a/server/gameserver/room.h
+++ b/server/gameserver/room.h
@@ -89,8 +89,14 @@ public:
     void DropItem(a8::Vec2 pos, int item_id, int item_count, int item_lv);
 
     int CreateLoot(int equip_id, a8::Vec2 pos, int count, int equip_lv);
-    void CreateBullet(Human* hum, Weapon* weapon,
-                      a8::Vec2 pos, a8::Vec2 dir, float fly_distance, bool is_tank_skin = false);
+    void CreateBullet(Human* hum,
+                      MetaData::Equip* weapon_meta,
+                      MetaData::EquipUpgrade* weapon_upgrade_meta,
+                      MetaData::Equip* bullet_meta,
+                      a8::Vec2 pos,
+                      a8::Vec2 dir,
+                      float fly_distance,
+                      bool is_tank_skin = false);
 
     void OnHumanDie(Human* hum);
     void OnHumanRevive(Human* hum);
diff --git a/server/gameserver/types.cc b/server/gameserver/types.cc
index 96ccafa..667e895 100644
--- a/server/gameserver/types.cc
+++ b/server/gameserver/types.cc
@@ -14,6 +14,7 @@ void Weapon::ToPB(cs::MFWeapon* pb_obj)
 void Weapon::Recalc()
 {
     upgrade_meta = MetaMgr::Instance()->GetEquipUpgrade(weapon_id);
+    bullet_meta = MetaMgr::Instance()->GetEquip(meta->i->use_bullet());
 }
 
 int Weapon::GetClipVolume()
diff --git a/server/gameserver/types.h b/server/gameserver/types.h
index ba43604..b982aa2 100755
--- a/server/gameserver/types.h
+++ b/server/gameserver/types.h
@@ -38,6 +38,7 @@ struct Weapon
     int weapon_lv = 0;
     int ammo = 0;
     MetaData::Equip* meta = nullptr;
+    MetaData::Equip* bullet_meta = nullptr;
 
     void ToPB(cs::MFWeapon* pb_obj);
     void Recalc();