diff --git a/GameServer/Server/CallGS/Handlers/Weapon/Weapon_Replace.cs b/GameServer/Server/CallGS/Handlers/Weapon/Weapon_Replace.cs
new file mode 100644
index 0000000..e6f81ed
--- /dev/null
+++ b/GameServer/Server/CallGS/Handlers/Weapon/Weapon_Replace.cs
@@ -0,0 +1,49 @@
+using MikuSB.Database;
+using MikuSB.Proto;
+using System.Text.Json;
+
+namespace MikuSB.GameServer.Server.CallGS.Handlers.Weapon;
+
+[CallGSApi("Weapon_Replace")]
+public class Weapon_Replace : ICallGSHandler
+{
+    public async Task Handle(Connection connection, string param, ushort seqNo)
+    {
+        var player = connection.Player!;
+        var req = JsonSerializer.Deserialize<WeaponReplaceParam>(param);
+        var cardData = req == null ? null : player.CharacterManager.GetCharacterByGUID((uint)req.CardId);
+        var newWeapon = req == null ? null : player.InventoryManager.GetWeaponItem((uint)req.Id);
+
+        if (cardData != null && newWeapon != null)
+        {
+            var oldWeaponId = cardData.WeaponUniqueId;
+            var oldWeapon = oldWeaponId == 0 ? null : player.InventoryManager.GetWeaponItem(oldWeaponId);
+
+            cardData.WeaponUniqueId = newWeapon.UniqueId;
+            newWeapon.EquipAvatarId = cardData.Guid;
+
+            if (oldWeapon != null && oldWeapon.UniqueId != newWeapon.UniqueId)
+            {
+                oldWeapon.EquipAvatarId = 0;
+            }
+
+            DatabaseHelper.SaveDatabaseType(player.CharacterManager.CharacterData);
+            DatabaseHelper.SaveDatabaseType(player.InventoryManager.InventoryData);
+
+            var sync = new NtfSyncPlayer
+            {
+                Items = { cardData.ToProto() }
+            };
+            await CallGSRouter.SendScript(connection, "Weapon_Replace", "{}", sync);
+            return;
+        }
+
+        await CallGSRouter.SendScript(connection, "Weapon_Replace", "{}");
+    }
+}
+
+internal sealed class WeaponReplaceParam
+{
+    public int CardId { get; set; }
+    public int Id { get; set; }
+}