Or bins, buckets, boxes of receivers went into storage after completion and pulled randomly to fill orders, as SOP, instead flowing straight into the production line. We assume that Savage production was linear when in fact I'll bet it wasn't.
Possible, but the pictures I've seen of the manufacturing/assembly shows racks of guns being moved as groups, not as a wall of racked parts or what not. Might have been different before the receivers got paired with stocks..
