diff --git a/OpenRA.Mods.RA/Attack/AttackGarrisoned.cs b/OpenRA.Mods.RA/Attack/AttackGarrisoned.cs
index 0cfeba787f..d7046919bd 100644
--- a/OpenRA.Mods.RA/Attack/AttackGarrisoned.cs
+++ b/OpenRA.Mods.RA/Attack/AttackGarrisoned.cs
@@ -117,7 +117,7 @@ namespace OpenRA.Mods.RA
 		{
 			// Pick a random port that faces the target
 			var bodyYaw = facing.Value != null ? WAngle.FromFacing(facing.Value.Facing) : WAngle.Zero;
-			var indices = Exts.MakeArray(Ports.Length, i => i).Shuffle(self.World.SharedRandom);
+			var indices = Enumerable.Range(0, Ports.Length).Shuffle(self.World.SharedRandom);
 			foreach (var i in indices)
 			{
 				var yaw = bodyYaw + Ports[i].Yaw;
diff --git a/OpenRA.Mods.RA/LimitedAmmo.cs b/OpenRA.Mods.RA/LimitedAmmo.cs
index 762a800606..6228c0dbb4 100644
--- a/OpenRA.Mods.RA/LimitedAmmo.cs
+++ b/OpenRA.Mods.RA/LimitedAmmo.cs
@@ -9,6 +9,7 @@
 #endregion
 
 using System.Collections.Generic;
+using System.Linq;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
@@ -66,8 +67,9 @@ namespace OpenRA.Mods.RA
 		public IEnumerable<PipType> GetPips(Actor self)
 		{
 			var pips = Info.PipCount != 0 ? Info.PipCount : Info.Ammo;
-			return Exts.MakeArray(pips,
-				i => (ammo * pips) / Info.Ammo > i ? Info.PipType : Info.PipTypeEmpty);
+			return Enumerable.Range(0, pips).Select(i =>
+				(ammo * pips) / Info.Ammo > i ?
+				Info.PipType : Info.PipTypeEmpty);
 		}
 	}
 }
diff --git a/OpenRA.Mods.RA/StoresResources.cs b/OpenRA.Mods.RA/StoresResources.cs
index 774f667ad2..6052083f5d 100644
--- a/OpenRA.Mods.RA/StoresResources.cs
+++ b/OpenRA.Mods.RA/StoresResources.cs
@@ -9,6 +9,7 @@
 #endregion
 
 using System.Collections.Generic;
+using System.Linq;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
@@ -57,9 +58,9 @@ namespace OpenRA.Mods.RA
 
 		public IEnumerable<PipType> GetPips(Actor self)
 		{
-			return Exts.MakeArray(Info.PipCount,
-				i => (Player.Resources * Info.PipCount > i * Player.ResourceCapacity)
-					? Info.PipColor : PipType.Transparent);
+			return Enumerable.Range(0, Info.PipCount).Select(i =>
+				Player.Resources * Info.PipCount > i * Player.ResourceCapacity
+				? Info.PipColor : PipType.Transparent);
 		}
 
 		public bool ShouldExplode(Actor self) { return Stored > 0; }
diff --git a/OpenRA.Mods.RA/Widgets/Logic/LobbyUtils.cs b/OpenRA.Mods.RA/Widgets/Logic/LobbyUtils.cs
index 935440bdc8..41723428af 100644
--- a/OpenRA.Mods.RA/Widgets/Logic/LobbyUtils.cs
+++ b/OpenRA.Mods.RA/Widgets/Logic/LobbyUtils.cs
@@ -84,7 +84,7 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 				return item;
 			};
 
-			var options = Exts.MakeArray(teamCount + 1, i => i).ToList();
+			var options = Enumerable.Range(0, teamCount + 1);
 			dropdown.ShowDropDown("TEAM_DROPDOWN_TEMPLATE", 150, options, setupItem);
 		}