Mostly Brown Bess, but some early percussion conversions. Original 3rd model India Pattern Brown Bess muskets were converted to percussion and reissued as the P-1839. The official dates of the war are 1839-1842, so I doubt that pattern-1842 percussion muskets would have been in use, except possibly at the end. I doubt that there were many rifles, and if there were, would have been Brunswick as already mentioned.