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.
Info : Lawdog734 is mostly correct.
The M10xx series are steel sheet metal
The M1114 are thick steel [ roof ] with different turret and support, same older sponsons will work from M10XX series.
M1151, 1165.... uses an aluminum roof, sponsons, hatch , and turret.
I have turrets for all these.