diff --git a/org.adempiere.base/src/org/compiere/model/MRefList.java b/org.adempiere.base/src/org/compiere/model/MRefList.java
index 4aa7e9f4e1..596a2fe582 100644
--- a/org.adempiere.base/src/org/compiere/model/MRefList.java
+++ b/org.adempiere.base/src/org/compiere/model/MRefList.java
@@ -28,6 +28,8 @@ import org.compiere.util.DB;
 import org.compiere.util.Env;
 import org.compiere.util.Util;
 import org.compiere.util.ValueNamePair;
+import org.idempiere.cache.ImmutablePOCache;
+import org.idempiere.cache.ImmutablePOSupport;
 
 /**
  *  Reference List Value
@@ -39,13 +41,16 @@ import org.compiere.util.ValueNamePair;
  *  		<li>BF [ 1748449 ] Info Account - Posting Type is not translated
  *  		<li>FR [ 2694043 ] Query. first/firstOnly usage best practice
  */
-public class MRefList extends X_AD_Ref_List
+public class MRefList extends X_AD_Ref_List implements ImmutablePOSupport
 {
 	/**
 	 * 
 	 */
 	private static final long serialVersionUID = 2342762307330992884L;
 
+	/**	RefList Value Cache						*/
+	private static ImmutablePOCache<String,MRefList> s_ref_value_cache	= new ImmutablePOCache<String,MRefList>(Table_Name, 40);
+
 	/**
 	 * 	Get Reference List 
 	 *	@param ctx context
@@ -54,12 +59,47 @@ public class MRefList extends X_AD_Ref_List
 	 *	@param trxName transaction
 	 *	@return List or null
 	 */
-	public static MRefList get (Properties ctx, int AD_Reference_ID, String Value, String trxName)
+	public static synchronized MRefList get (Properties ctx, int AD_Reference_ID, String Value, String trxName)
 	{
-		return new Query(ctx, Table_Name, "AD_Reference_ID=? AND Value=?", trxName)
+		StringBuilder sb = new StringBuilder(AD_Reference_ID)
+								.append("|")
+								.append(Value);
+		String key = sb.toString();
+		MRefList rl = s_ref_value_cache.get(ctx, key, e -> new MRefList(ctx, e));
+		if (rl == null)
+		{
+			rl = new Query(ctx, Table_Name, "AD_Reference_ID=? AND Value=?", trxName)
 					.setParameters(AD_Reference_ID, Value)
-					.firstOnly();
+					.first();
+			if (rl != null)
+			{
+				s_ref_value_cache.put(key, rl, e -> new MRefList(Env.getCtx(), e));
+			}
+		}
+		return rl;
 	}	//	get
+
+	/**
+	 * 
+	 * @param ctx
+	 * @param copy
+	 */
+	public MRefList(Properties ctx, MRefList copy) 
+	{
+		this(ctx, copy, (String) null);
+	}
+	
+	/**
+	 * 
+	 * @param ctx
+	 * @param copy
+	 * @param trxName
+	 */
+	public MRefList(Properties ctx, MRefList copy, String trxName) 
+	{
+		this(ctx, 0, trxName);
+		copyPO(copy);
+	}
 	
 	/**
 	 * Get Reference List Value Name (cached)
@@ -304,5 +344,13 @@ public class MRefList extends X_AD_Ref_List
 		return getName();
 	}	//	toString
 
+	@Override
+	public PO markImmutable() {
+		if (is_Immutable())
+			return this;
+
+		makeImmutable();
+		return this;
+	}
 
 }	//	MRef_List