diff --git a/Projects/Server/Items/Item.cs b/Projects/Server/Items/Item.cs
index bbf718c65..3a8adafe1 100644
--- a/Projects/Server/Items/Item.cs
+++ b/Projects/Server/Items/Item.cs
@@ -536,6 +536,14 @@ public partial class Item : IHued, IComparable<Item>, ISpawnable, IObjectPropert
         }
     }
 
+    // SendMobileIncoming (0x78) sends only the first item per layer (it dedupes via the
+    // `layers` span). Equipment Layer comes from tiledata, so e.g. a two-handed weapon and a
+    // shield both resolve to Layer.TwoHanded; a later same-layer item sent on its own via
+    // EquipUpdate (0x2E) or its OPL would leave the client holding two items on one equipment
+    // slot (a use-after-free on the legacy 2D client when that slot is later torn down).
+    // Returns true if this equipped item is such a later duplicate and must not be sent alone.
+    public bool IsDupedEquipLayer() => m_Parent is Mobile m && m.FindItemOnLayer(m_Layer) != this;
+
     public List<Item> Items => LookupItems() ?? EmptyItems;
 
     public int LookupContainerVersion() => (this as Container)?._version ?? LookupCompactInfo()?.Version ?? 0;
@@ -1387,6 +1395,14 @@ public partial class Item : IHued, IComparable<Item>, ISpawnable, IObjectPropert
             return;
         }
 
+        // A second item sharing an equipment layer is omitted by SendMobileIncoming (0x78);
+        // sending it on its own via EquipUpdate/OPL would leave the client with two items on
+        // one slot. Skip the per-client sends entirely for the dupe.
+        if (IsDupedEquipLayer())
+        {
+            return;
+        }
+
         foreach (var state in map.GetClientsInRange(worldLoc, GetMaxUpdateRange()))
         {
             var m = state.Mobile;
diff --git a/Projects/Server/Mobiles/Mobile.cs b/Projects/Server/Mobiles/Mobile.cs
index f20d972b6..778d5b5a7 100644
--- a/Projects/Server/Mobiles/Mobile.cs
+++ b/Projects/Server/Mobiles/Mobile.cs
@@ -5187,14 +5187,18 @@ public partial class Mobile : IHued, IComparable<Mobile>, ISpawnable, IObjectPro
             }
             else if (item.Parent is Mobile)
             {
-                state.SendEquipUpdate(item);
+                // Don't re-show a duped-layer item on its own (see Item.IsDupedEquipLayer).
+                if (!item.IsDupedEquipLayer())
+                {
+                    state.SendEquipUpdate(item);
+                }
             }
             else
             {
                 item.SendInfoTo(state);
             }
 
-            if (item.Parent != null)
+            if (item.Parent != null && !item.IsDupedEquipLayer())
             {
                 item.SendOPLPacketTo(state);
             }