While I was watching the Military Channel this afternoon, a documentary on WWI and German sabotage in the US, they were talking about German sabotage in New York. The Germans set fires on an island near the Statue of Liberty and blew up six months worth of munitions headed to Russia. In the next clip there is a US soldier walking post on a sidewalk, presumably in New York or close-by, carrying a Trapdoor on his shoulder. Sorry I can't provide a link, but the part I thought interesting was to see a Trapdoor in active use at this comparitively late date. I backed up the DVR and watched again. There was no mistaking the long rifle and the prominent hammer. Just interesting.
I knew these were sold out of the local state guard stores in the 1930s, just didn't know they were in use so late. Guess everyone didn't get new rifles in the changeover after 1903 or even when Krags came into use in the 1890s.