At the Varnum Memorial Armory Museum, we have the .44-caliber New Model Army revolver that was carried by Sergeant George Byron Bennett (of the 1st Rhode Island Cavalry) in the last year or two of the American Civil War. It is marked with his initials.
The pistol was made by Eliphalet Remington & Sons in Ilion, NY, in 1863 or early 1864. Over 230,000 were made with many being purchased for military use (as the Colt M1860 revolver became hard to get due to massive fire at their factory in Hartford, CT). Cavalrymen were heavily armed, so Bennett also would have carried a sword and a breech-loading carbine.