3838AST are listed for use with MC-AP. Connector has MCI-A rating in UL directory. The EGS connectors are also MCI-A rated. Even states it on the box. So unless you have a cable size discrepancy (outside of specified range), both look ok.
Although Southwire tries to be helpful with the chart, Southwire is not the final word. When MC-AP first came out as MC-Smart, there were few connectors with a MCI-A listing. Installers and inspectors were confused as to the correct connector. Now it is the opposite. Everybody has a MC connector(s) that is listed for MCI-A.
I do not know of a separate/additional listing for use with HCF. Anyone point out something here (besides the application chart)? Even the MC-AP HCF tag says to use just a MCI-A connector.
Arlington's info from the UL directory:
AWSX.E18304
Armored Cable Connectors, Type AC
ARLINGTON INDUSTRIES INC
| E18304
| |