Deactivated Colt Dragoon 1848 .44 Calibre 2nd Model Revolver with nickel plated frame, engraved cylinder and carved wooden grips. Armi San Marco replica in very good deactivated condition. The massive Colt Dragoon 1848 Percussion Army Revolver in .44 calibre was designed by Samuel Colt for the U.S. Army's Mounted Rifles, also known as Dragoons. This revolver was designed as a solution to numerous problems encountered with the Walker Colt. Although it was introduced after the Mexican-American War, it became popular among civilians during the 1850s and '60s, and was also used during the American Civil War. All deactivated weapons sold by D and B Militaria are deactivated in the United Kingdom and hold a London or Birmingham proof mark and certificate stating that the weapon has been deactivated correctly and is legal within the U.K.