Weapon Customizations Script Problem

Hey, I made this uncompleted script but for some reason for switching my primary weapons its not working the way I want it to, Please Help, Thanks

 var currentPrimary = "Galil";
 var currentSecoundary = "Desert Eagle";
 
 
 function Start () {
 
 }
 
 function Update () {
 
 }
 
 function OnGUI () {
     
     GUI.Label (Rect (Screen.width / 3 + 130, Screen.height / 3, 125, 25), "Primary Weapon");
     
     GUI.TextArea (Rect (Screen.width / 3 + 130, Screen.height / 3 + 25, 125, 25), currentPrimary, 25);
     
     if ( GUI.Button (Rect (Screen.width / 3 + 50, Screen.height / 3 + 25, 25, 25), "<") ) {
     if ( currentPrimary == "Galil" ) {
     currentPrimary = "UMP-45";
     }
     
     if ( currentPrimary == "UMP-45" ) {
     currentPrimary = "Spas-12";
     }
     
     if ( currentPrimary == "Spas-12" ) {
     currentPrimary = "Galil";
     }
     
     }    
     if ( GUI.Button (Rect (Screen.width / 3 + 325, Screen.height / 3 + 25, 25, 25), ">") ) {
     if ( currentPrimary == "Galil" ) {
     currentPrimary = "Spas-12";
     }
     
     if ( currentPrimary == "UMP-45" ) {
     currentPrimary = "Galil";
     }
     
     if ( currentPrimary == "Spas-12" ) {
     currentPrimary = "UMP-45";
     }
     
     }
     
     
     // ----------------------
     
     GUI.Label (Rect (Screen.width / 3 + 130, Screen.height / 3 + 55, 125, 25), "Secoundary Weapon");
     
     GUI.TextArea (Rect (Screen.width / 3 + 130, Screen.height / 3 + 80, 125, 25), currentSecoundary, 25);
     
     if ( GUI.Button (Rect (Screen.width / 3 + 50, Screen.height / 3 + 80, 25, 25), "<") ) {
     
     }    
     if ( GUI.Button (Rect (Screen.width / 3 + 325, Screen.height / 3 + 80, 25, 25), ">") ) {
     
     }
     
     // ----------------------
     
     
     GUI.TextArea (Rect (Screen.width / 3, Screen.height / 4, 500, 300), "Weapon Customisation", 25);
 }