diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index 049903fbd5..f843856bcc 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -178,6 +178,7 @@ namespace OpenRA.Traits
 	public interface ISpeedModifier { int GetSpeedModifier(); }
 	public interface IFirepowerModifier { int GetFirepowerModifier(); }
 	public interface IReloadModifier { int GetReloadModifier(); }
+	public interface IInaccuracyModifier { int GetInaccuracyModifier(); }
 	public interface IPowerModifier { int GetPowerModifier(); }
 	public interface ILoadsPalettes { void LoadPalettes(WorldRenderer wr); }
 	public interface IPaletteModifier { void AdjustPalette(IReadOnlyDictionary<string, MutablePalette> b); }
diff --git a/OpenRA.Mods.RA/Effects/Bullet.cs b/OpenRA.Mods.RA/Effects/Bullet.cs
index bda2e0a9a7..03f54a5808 100755
--- a/OpenRA.Mods.RA/Effects/Bullet.cs
+++ b/OpenRA.Mods.RA/Effects/Bullet.cs
@@ -82,7 +82,10 @@ namespace OpenRA.Mods.RA.Effects
 			target = args.PassiveTarget;
 			if (info.Inaccuracy.Range > 0)
 			{
-				var maxOffset = info.Inaccuracy.Range * (target - pos).Length / args.Weapon.Range.Range;
+				var modifiers = args.SourceActor.TraitsImplementing<IInaccuracyModifier>()
+					.Select(m => m.GetInaccuracyModifier());
+				var inaccuracy = Traits.Util.ApplyPercentageModifiers(info.Inaccuracy.Range, modifiers);
+				var maxOffset = inaccuracy * (target - pos).Length / args.Weapon.Range.Range;
 				target += WVec.FromPDF(args.SourceActor.World.SharedRandom, 2) * maxOffset / 1024;
 			}
 
diff --git a/OpenRA.Mods.RA/Effects/Missile.cs b/OpenRA.Mods.RA/Effects/Missile.cs
index 97167085a3..222d02474c 100755
--- a/OpenRA.Mods.RA/Effects/Missile.cs
+++ b/OpenRA.Mods.RA/Effects/Missile.cs
@@ -85,7 +85,12 @@ namespace OpenRA.Mods.RA.Effects
 			targetPosition = args.PassiveTarget;
 
 			if (info.Inaccuracy.Range > 0)
-				offset = WVec.FromPDF(args.SourceActor.World.SharedRandom, 2) * info.Inaccuracy.Range / 1024;
+			{
+				var modifiers = args.SourceActor.TraitsImplementing<IInaccuracyModifier>()
+					.Select(m => m.GetInaccuracyModifier());
+				var inaccuracy = Traits.Util.ApplyPercentageModifiers(info.Inaccuracy.Range, modifiers);
+				offset = WVec.FromPDF(args.SourceActor.World.SharedRandom, 2) * inaccuracy / 1024;
+			}
 
 			if (info.Image != null)
 			{
diff --git a/OpenRA.Mods.RA/GainsStatUpgrades.cs b/OpenRA.Mods.RA/GainsStatUpgrades.cs
index 24f8b05f35..89bc57acd8 100644
--- a/OpenRA.Mods.RA/GainsStatUpgrades.cs
+++ b/OpenRA.Mods.RA/GainsStatUpgrades.cs
@@ -30,16 +30,20 @@ namespace OpenRA.Mods.RA
 		public readonly string ReloadUpgrade = "reload";
 		public readonly int[] ReloadModifier = { 95, 90, 85, 75 };
 
+		public readonly string InaccuracyUpgrade = "inaccuracy";
+		public readonly int[] InaccuracyModifier = { 90, 80, 70, 50 };
+
 		public object Create(ActorInitializer init) { return new GainsStatUpgrades(this); }
 	}
 
-	public class GainsStatUpgrades : IUpgradable, IFirepowerModifier, IDamageModifier, ISpeedModifier, IReloadModifier
+	public class GainsStatUpgrades : IUpgradable, IFirepowerModifier, IDamageModifier, ISpeedModifier, IReloadModifier, IInaccuracyModifier
 	{
 		readonly GainsStatUpgradesInfo info;
 		[Sync] int firepowerLevel = 0;
 		[Sync] int speedLevel = 0;
 		[Sync] int damageLevel = 0;
 		[Sync] int reloadLevel = 0;
+		[Sync] int inaccuracyLevel = 0;
 
 		public GainsStatUpgrades(GainsStatUpgradesInfo info)
 		{
@@ -51,7 +55,8 @@ namespace OpenRA.Mods.RA
 			return (type == info.FirepowerUpgrade && firepowerLevel < info.FirepowerModifier.Length)
 				|| (type == info.DamageUpgrade && damageLevel < info.DamageModifier.Length)
 				|| (type == info.SpeedUpgrade && speedLevel < info.SpeedModifier.Length)
-				|| (type == info.ReloadUpgrade && reloadLevel < info.ReloadModifier.Length);
+				|| (type == info.ReloadUpgrade && reloadLevel < info.ReloadModifier.Length)
+				|| (type == info.InaccuracyUpgrade && inaccuracyLevel < info.InaccuracyModifier.Length);
 		}
 
 		public void UpgradeAvailable(Actor self, string type, bool available)
@@ -65,6 +70,8 @@ namespace OpenRA.Mods.RA
 				speedLevel = (speedLevel + mod).Clamp(0, info.SpeedModifier.Length);
 			else if (type == info.ReloadUpgrade)
 				reloadLevel = (reloadLevel + mod).Clamp(0, info.ReloadModifier.Length);
+			else if (type == info.InaccuracyUpgrade)
+				inaccuracyLevel = (inaccuracyLevel + mod).Clamp(0, info.InaccuracyModifier.Length);
 		}
 
 		public int GetDamageModifier(Actor attacker, DamageWarhead warhead)
@@ -86,5 +93,10 @@ namespace OpenRA.Mods.RA
 		{
 			return reloadLevel > 0 ? info.ReloadModifier[reloadLevel - 1] : 100;
 		}
+
+		public int GetInaccuracyModifier()
+		{
+			return inaccuracyLevel > 0 ? info.InaccuracyModifier[inaccuracyLevel - 1] : 100;
+		}
 	}
 }