diff --git a/MLAPI/NetworkingManagerComponents/Binary/BitReader.cs b/MLAPI/NetworkingManagerComponents/Binary/BitReader.cs
index 2541fc4..af448d5 100644
--- a/MLAPI/NetworkingManagerComponents/Binary/BitReader.cs
+++ b/MLAPI/NetworkingManagerComponents/Binary/BitReader.cs
@@ -41,16 +41,16 @@ namespace MLAPI.NetworkingManagerComponents.Binary
         public short ReadShort() => (short)ZigZagDecode(ReadUShort(), 2);
         public int ReadInt() => (int)ZigZagDecode(ReadUInt(), 4);
         public long ReadLong() => ZigZagDecode(ReadULong(), 8);
-        public float[] ReadFloatArray() => ReadArray(ReadFloat);
-        public double[] ReadDoubleArray() => ReadArray(ReadDouble);
-        public byte[] ReadByteArray() => ReadArray(ReadByte);
-        public ushort[] ReadUShortArray() => ReadArray(ReadUShort);
-        public uint[] ReadUIntArray() => ReadArray(ReadUInt);
-        public ulong[] ReadULongArray() => ReadArray(ReadULong);
-        public sbyte[] ReadSByteArray() => ReadArray(ReadSByte);
-        public short[] ReadShortArray() => ReadArray(ReadShort);
-        public int[] ReadIntArray() => ReadArray(ReadInt);
-        public long[] ReadLongArray() => ReadArray(ReadLong);
+        public float[] ReadFloatArray(int known = -1) => ReadArray(ReadFloat, known);
+        public double[] ReadDoubleArray(int known = -1) => ReadArray(ReadDouble, known);
+        public byte[] ReadByteArray(int known = -1) => ReadArray(ReadByte, known);
+        public ushort[] ReadUShortArray(int known = -1) => ReadArray(ReadUShort, known);
+        public uint[] ReadUIntArray(int known = -1) => ReadArray(ReadUInt, known);
+        public ulong[] ReadULongArray(int known = -1) => ReadArray(ReadULong, known);
+        public sbyte[] ReadSByteArray(int known = -1) => ReadArray(ReadSByte, known);
+        public short[] ReadShortArray(int known = -1) => ReadArray(ReadShort, known);
+        public int[] ReadIntArray(int known = -1) => ReadArray(ReadInt, known);
+        public long[] ReadLongArray(int known = -1) => ReadArray(ReadLong, known);
         public string ReadString() => Encoding.UTF8.GetString(ReadByteArray());
 
         private ulong ReadULong()
@@ -79,9 +79,9 @@ namespace MLAPI.NetworkingManagerComponents.Binary
             }
             return res;
         }
-        private T[] ReadArray<T>(Getter<T> g)
+        private T[] ReadArray<T>(Getter<T> g, int knownSize = -1)
         {
-            T[] result = new T[ReadUShort()];
+            T[] result = new T[knownSize > 0 ? (uint)knownSize : ReadUInt()];
             for (ushort s = 0; s < result.Length; ++s)
                 result[s] = g();
             return result;
diff --git a/MLAPI/NetworkingManagerComponents/Binary/BitWriter.cs b/MLAPI/NetworkingManagerComponents/Binary/BitWriter.cs
index 68118ff..114add6 100644
--- a/MLAPI/NetworkingManagerComponents/Binary/BitWriter.cs
+++ b/MLAPI/NetworkingManagerComponents/Binary/BitWriter.cs
@@ -91,17 +91,23 @@ namespace MLAPI.NetworkingManagerComponents.Binary
         public void WriteShort(short s)             => Push(s);
         public void WriteInt(int i)                 => Push(i);
         public void WriteLong(long l)               => Push(l);
-        public void WriteFloatArray(float[] f)      => Push(f);
-        public void WriteDoubleArray(double[] d)    => Push(d);
-        public void WriteByteArray(byte[] b)        => Push(b);
-        public void WriteUShortArray(ushort[] s)    => Push(s);
-        public void WriteUIntArray(uint[] i)        => Push(i);
-        public void WriteULongArray(ulong[] l)      => Push(l);
-        public void WriteSByteArray(sbyte[] b)      => Push(b);
-        public void WriteShortArray(short[] s)      => Push(s);
-        public void WriteIntArray(int[] i)          => Push(i);
-        public void WriteLongArray(long[] l)        => Push(l);
         public void WriteString(string s)           => Push(s);
+        public void WriteFloatArray(float[] f, bool known = false)      => PushArray(f, known);
+        public void WriteDoubleArray(double[] d, bool known = false)    => PushArray(d, known);
+        public void WriteByteArray(byte[] b, bool known = false)        => PushArray(b, known);
+        public void WriteUShortArray(ushort[] s, bool known = false)    => PushArray(s, known);
+        public void WriteUIntArray(uint[] i, bool known = false)        => PushArray(i, known);
+        public void WriteULongArray(ulong[] l, bool known = false)      => PushArray(l, known);
+        public void WriteSByteArray(sbyte[] b, bool known = false)      => PushArray(b, known);
+        public void WriteShortArray(short[] s, bool known = false)      => PushArray(s, known);
+        public void WriteIntArray(int[] i, bool known = false)          => PushArray(i, known);
+        public void WriteLongArray(long[] l, bool known = false)        => PushArray(l, known);
+
+        private void PushArray<T>(T[] t, bool knownSize = false)
+        {
+            if (!knownSize) Push(t);
+            else foreach (T t1 in t) Push(t1);
+        }
 
         public long Finalize(ref byte[] buffer)
         {
@@ -139,7 +145,7 @@ namespace MLAPI.NetworkingManagerComponents.Binary
             if (type.IsArray)
             {
                 var array = t as Array;
-                Serialize((ushort)array.Length, writeTo, ref bitOffset);
+                Serialize((uint)array.Length, writeTo, ref bitOffset);
                 foreach (var element in array)
                     Serialize(element, writeTo, ref bitOffset);
             }