From their website:
The miniatures come with separate heads and right arms allowing lots of variation in your units. These are compatible with the plastics and the other metal sets giving you immense scope for individuality. You’ll need plenty of our 1809-1815 Russian Line Infantry to go with that command pack! You can order the them from the webstore here.
Be sure to scope out our previously released command pack for the 1812 infantry set as well. Again these come with separate arm and head options.