Also, here's the explanation for the Schroeder Steel Sword:
From what I can tell, this Schroeder Steel Sword is an alternative to both the MVS and Needle Blazer technology, but was never mass-produced because it appears to be so costly to make and replace. I hope we get at least a bit more information on this Schroeder Steel alloy, since it's the first time we're hearing of it in the CG universe.