I'm guessing you are referring to a Remington when you say 1861 New Army which is its correct designation. If Remington ever made this model with a half or full fluted cylinder I'm unaware of it and would appreciate a link to any info about one. Pietta has offered a full fluted version on and off over the years and while impressive in appearance and with better handling I have always regarded it as a fantasy gun (I have 2). I've seen the 1875 Remington which is somewhat similar but an entirely different gun sometimes called the "improved army" and the "frontier army" but I'm not sure if those terms were ever used by Remington or if they even go back to that time or are more modern.