Use one of the following entries with the giveitem self code.

light_armor
medium_armor
heavy_armor
qasuperarmor

Note: The qasuperarmor code can be used as in the following example, giveitem self 10 qasuperarmor manf_jorman_armor_hazard. This spawns a level X suit of Jormangund Technologies light armor, with the following stats: 99 physical protection, 20,000 shields, and 99 Tech/Biotic protection. There appears to be no way to specify medium or heavy armor types. The stats and appearance will vary greatly depending on which manufacturer string is used.