Major 2,
My statement was somewhat simplistic, but was meant to answer the original question as directly as possible.
"Kits" (mostly brass frames) do fallow shortly after the Centennial, but I can't remember just when they were introduced.
They were indeed "very inexpensive"! And as a result this lends presidents to the brass frames as being "cheaply made arms". (as your message implies)
One other side effect to the introduction of brass frame arms, is the association that "all" brass frame guns are CSA copies of US made arms. An untruth that still prevails in the modern gun culture to this date.
My best,
Blair