Charter Arms is going to do .40 S&W, 9mm, and 45 acp 5rd snubbies. A moonclip fed 5 round 45 acp snub nose might really attract some attention. 44 special snubs are pretty rare, and 44 special simply costs too much for the average CCW user. .45 acp is much more reasonable with a very wide selection of excellent commerical defensive loadings.