Great knowledge there!

I did a search on the dragoon when I saw Shazib's post last night, but it didn't quite look right.
The main difference to me was the dragoon's shorter barrel, compared to the Denix.
But knowing how their models are, I thought the Denix might have been wrong.

shaz,

Oh, just to complicate things the barrel on the original period .36 caliber Colt Navy, 51's are usually hexagonal - not round, who knows why Denix made the barrel the way they did - I think we have probably tried to analyze this replica enough, though, lol.
The Dragoon, Walker and smoothed edged Army's are all usually encountered in .44. which is actually .454 when you buy lead for it - I guess it's like the .38 which is actually .35 if you measure it, to be precise .357"

Looking around the web found a denix for sale same as this one with the folowing description:

"This replica brass-framed Civil War pistol is a version of the Griswald & Gunnison Type that were made by contract to the Confederacy in Georgia, and only 500 or so were ever made between 1862 & 1864, and only about a dozen now survive or exist in various museums and private collections today. It was very similar to a Model 1851 Colt Navy pistol, but the Colt had an octagonal barrel, and the Griswold had the round barrel as shown."

New info to me, anyone know if this could be true?

http://cgi.ebay.com/ARMY-MODEL-1851-REPLICA-REVOLVER-PISTOL-Gun_W0QQitemZ350252472255QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item518cac97bf&_trksid=p3286.c0.m14

Page 526 of Flaydermans - there are two pictured.
Word for word the description, this is almost certainly where the guy got it from.
(Actually impressed someone still reads books, the internet has so much circumspect and inaccurate info. on it)
Hammer and cylinder are different, but same barrel design.
The Denix is a more faithful copy of this than the standard Colt navy 1851, for sure.
(or any of the four or five other Confederate copies of the 1851 Navy, there are other with round barrels.)