I think you are mistaken.. MX-10130E/UV and MX-11769A tubes are not only autogated types, these are Gen4 filmless tubes made by Northrop Grumman. The same about MX-10160B/UV.. CHeck the NG website for specsheets.
Gen3 tubes are MX-10130D/UV and MX-11769/UV, autogated or not. Just FYI, all three tubes I got produce audible whining noise and they are MX-10130D/UV, contract OMNI VI PY1 from 2005 and two MX-11769/UVs from 2007, assumably OMNI VI PY3 or OMNI VII.
The AG suffix you mentioned only applies for tubes without MX designation, ergo non-MilSpec types.
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