Help on attachment script!

Basically I want to make an array of Transforms so that if a variable (activeMenu), that menu would be active and you could change the current active Attachment(activeChild). I can't really explain it well, but here's my script:

 var attachments : Transform[];
 
 var activeMenu : int = -1;
 
 //var skin : GUISkin;
 
 var activeChild = new Array();
 
 var gunLogic : GameObject;
 
 function OnGUI () 
 {
     var yOffset = 55;
     
     for(a = 0; a < attachments.Length; a++)
     {
         activeChild[a].length = attachments[a].Length;
         //var AttachmentPos[a] = new Vector2(Attachment[a].x, Attachment[a].y)
         if (GUI.Button(new Rect(attachments[a].position.x, attachments[a].position.y, 500, 500), attachments[a].gameObject.name))
         {    
             //activeMenu = a;
         
         for(i = 0; i < attachments[activeMenu].childCount; i++)
             {
                 if(GUI.Button(new Rect(0, 100+(yOffset*i), 100, 50), attachments[activeMenu].GetChild(i).name))
                     activeChild[activeMenu] = i;
             }
         
     }
 }

I can get it to select the children in the selected Transform, but what I want is a varying transform array to choose from (E.X : SOPMOD M4A1 w/5 attachments vs ACR w/3 attachments). Any help on what I'm doing wrong?