Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
Check this link out. http://www.steelsoldiers.com/showthread.php?162090-Good-Article-on-the-Optimizer
Very well aware of the GM vs GEP difference. I was asking specifically the difference between the GEP 6.5 that are used as replacements in the m998 and the GEP 6.5 that is used in the M1123.