diff --git a/OpenRA.Mods.Common/Traits/Render/WithSpriteTurret.cs b/OpenRA.Mods.Common/Traits/Render/WithSpriteTurret.cs
index 0acd2cc278..924a7692c8 100644
--- a/OpenRA.Mods.Common/Traits/Render/WithSpriteTurret.cs
+++ b/OpenRA.Mods.Common/Traits/Render/WithSpriteTurret.cs
@@ -25,9 +25,6 @@ namespace OpenRA.Mods.Common.Traits.Render
 		[Desc("Sequence name to use")]
 		[SequenceReference] public readonly string Sequence = "turret";
 
-		[Desc("Sequence name to use when prepared to fire")]
-		[SequenceReference] public readonly string AimSequence = null;
-
 		[Desc("Turreted 'Turret' key to display")]
 		public readonly string Turret = "primary";
 
@@ -62,10 +59,9 @@ namespace OpenRA.Mods.Common.Traits.Render
 		}
 	}
 
-	public class WithSpriteTurret : ConditionalTrait<WithSpriteTurretInfo>, INotifyBuildComplete, INotifySold, INotifyTransform, ITick, INotifyDamageStateChanged
+	public class WithSpriteTurret : ConditionalTrait<WithSpriteTurretInfo>, INotifyBuildComplete, INotifySold, INotifyTransform, INotifyDamageStateChanged
 	{
 		public readonly Animation DefaultAnimation;
-		protected readonly AttackBase Attack;
 		readonly RenderSprites rs;
 		readonly BodyOrientation body;
 		readonly Turreted t;
@@ -79,7 +75,6 @@ namespace OpenRA.Mods.Common.Traits.Render
 		{
 			rs = self.Trait<RenderSprites>();
 			body = self.Trait<BodyOrientation>();
-			Attack = self.TraitOrDefault<AttackBase>();
 			t = self.TraitsImplementing<Turreted>()
 				.First(tt => tt.Name == info.Turret);
 			arms = self.TraitsImplementing<Armament>()
@@ -119,26 +114,11 @@ namespace OpenRA.Mods.Common.Traits.Render
 				DefaultAnimation.ReplaceAnim(NormalizeSequence(self, DefaultAnimation.CurrentSequence.Name));
 		}
 
-		protected virtual void Tick(Actor self)
-		{
-			if (Info.AimSequence == null)
-				return;
-
-			var sequence = Attack.IsAiming ? Info.AimSequence : Info.Sequence;
-			DefaultAnimation.ReplaceAnim(sequence);
-		}
-
 		void INotifyDamageStateChanged.DamageStateChanged(Actor self, AttackInfo e)
 		{
 			DamageStateChanged(self);
 		}
 
-		void ITick.Tick(Actor self)
-		{
-			// Split into a protected method to allow subclassing
-			Tick(self);
-		}
-
 		public void PlayCustomAnimation(Actor self, string name, Action after = null)
 		{
 			DefaultAnimation.PlayThen(NormalizeSequence(self, name), () =>
diff --git a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
index 2b5decb0b4..541304be4a 100644
--- a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
@@ -1756,6 +1756,24 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					}
 				}
 
+				// Removed AimSequence from WithSpriteTurret, use WithTurretAimAnimation instead
+				if (engineVersion < 20180224)
+				{
+					var spriteTurret = node.Value.Nodes.FirstOrDefault(n => n.Key.StartsWith("WithSpriteTurret", StringComparison.Ordinal));
+					if (spriteTurret != null)
+					{
+						var aimSequence = spriteTurret.Value.Nodes.FirstOrDefault(n => n.Key == "AimSequence");
+						if (aimSequence != null)
+						{
+							var aimAnim = new MiniYamlNode("WithTurretAimAnimation", "");
+							RenameNodeKey(aimSequence, "Sequence");
+							aimAnim.Value.Nodes.Add(aimSequence);
+							spriteTurret.Value.Nodes.Remove(aimSequence);
+							node.Value.Nodes.Add(aimAnim);
+						}
+					}
+				}
+
 				UpgradeActorRules(modData, engineVersion, ref node.Value.Nodes, node, depth + 1);
 			}
 
diff --git a/mods/cnc/rules/vehicles.yaml b/mods/cnc/rules/vehicles.yaml
index 577a7827e3..92d4e9faea 100644
--- a/mods/cnc/rules/vehicles.yaml
+++ b/mods/cnc/rules/vehicles.yaml
@@ -496,15 +496,17 @@ MSAM:
 		Weapon: 227mm
 		LocalOffset: 213,128,0, 213,-128,0
 	Armament@SECONDARY:
+		Name: secondary
 		Weapon: 227mm
 		LocalOffset: 213,-128,0, 213,128,0
 	AttackFrontal:
 	WithSpriteTurret:
-		AimSequence: aim
 	SpawnActorOnDeath:
 		Actor: MSAM.Husk
 		OwnerType: InternalName
 		EffectiveOwnerFromOwner: true
+	WithTurretAimAnimation:
+		Sequence: aim
 
 MLRS:
 	Inherits: ^Tank