Software modules screen shows N/A components for R4 to R5 upgrades.
When performing an upgrade of your Axiom from release 4.x to release 5.x, you might notice that when you look at the "Software Modules" screen in the GUI after staging the appropriate 5.x software, there is not a check box for the Brick Firmware or slammer PROM and the "Package Release" column for those components displays "N/A". This might seem to imply that these components are not going to be upgraded - but they will, if needed.
Due to a change in the 5.x software releases and how the software is applied, the Brick Firmware and slammer PROM will get upgraded by the Pilot after the Pilot is upgraded to 5.x. You can (and should) verify that all components were upgraded by looking at the "Software Components" screen on the Support tab in the 5.x GUI after the upgrade completes and comparing the release versions with those listed in the patch readme.