User blog comment:Grand Admiral Harmon/Across the Atlantic: Iron Brigade vs French Foreign Legion/@comment-4698460-20160916020312/@comment-236683-20160916160936

I've never read of the Colt being convertible until the 1870s with '71 being the earliest. If there is an earlier conversion set in '65 or before, then we'll go with it but if not, then cap and ball.