That is not correct... according to Spike's, back when there were massive shortages in the US, there was a period when Spike's was sourcing lower receivers from 5 or 6 different companies and Aero Precision was one of those sources. That was for a brief period of time.
Spike's has not used Aero Precision lowers in over a year and a half... and Spike's has never sourced uppers from Aero at any time.
This is not to say there is anything wrong with Aero Precision lowers... only that they don't make uppers or lowers for Spike's Tactical.
Mark