Armstrong did produce some percussion guns, but apparently not too many. I have seen two or three originals and sadly a few that had been, before some misguided nit wit had them changed to flint. No names here, but I know of at least one individual who had it done. Some rifles, of course were changed fron flint to cap, and I suppose that has been undone by this time (cap back to flint) for most if inot all. The Julia cap Armstrong was an original gun and worth even more than was paid out, in my opinion.
Be sure to check out the next Julia Auction as there are some great pieces in that one, too. I like the Armstorng, the Mauger, and the Edwards.
Dick