Ranged weapon firing does not depend on DefaultGrid anymore.

Content.Shared/GameObjects/Components/Weapons/Ranged/SharedRangedWeaponComponent.cs

@@ -1,6 +1,7 @@
-using System;
+using System;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Map;
+using Robust.Shared.Maths;
 using Robust.Shared.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Weapons.Ranged
@@ -26,14 +27,33 @@ namespace Content.Shared.GameObjects.Components.Weapons.Ranged
         }
     }
 
+    /// <summary>
+    /// A component message raised when the weapon is fired at a position on the map.
+    /// </summary>
     [Serializable, NetSerializable]
     public sealed class FirePosComponentMessage : ComponentMessage
     {
-        public GridCoordinates Target { get; }
+        /// <summary>
+        /// If this is not invalid, the target position is relative to the grid.
+        /// Otherwise, it is a map position.
+        /// </summary>
+        public GridId TargetGrid { get; }
 
-        public FirePosComponentMessage(GridCoordinates target)
+        /// <summary>
+        /// If Target Grid is not invalid, this is relative to the grid, otherwise
+        /// it is a map position.
+        /// </summary>
+        public Vector2 TargetPosition { get; }
+
+        /// <summary>
+        /// Constructs a new instance of <see cref="FirePosComponentMessage"/>.
+        /// </summary>
+        /// <param name="targetGrid">The grid that the target position is on, if any.</param>
+        /// <param name="targetPosition">Target position relative to the grid, or a map position if the grid is invalid.</param>
+        public FirePosComponentMessage(GridId targetGrid, Vector2 targetPosition)
         {
-            Target = target;
+            TargetGrid = targetGrid;
+            TargetPosition = targetPosition;
         }
     }
 }