The first 800 or so Old Armys had a wide flattop Baughman type ramp front sight and an adjustable target rear sight. After that the front sight had a more pointed profile. In 1994, the fixed sight model (BP-7F) was introduced with the traditional blade front sight. I believe the first models also had an aluminum grip frame (BP-7) before they were brass, then later, steel. The wide trigger was available with the brass grip frame (BP-7B) and approximately 1200 blued revolvers were made in this configuration. There were also several special editions made: The Liberty Series, the National Muzzle Loading Rifle Association Series, the Ruger Collectors Association Series and a 2nd Ruger Collectors Association Series.