In 2003, the design was overhauled to improve accuracy, update the styling, and reduce production costs. The standard Mini-14 was discontinued and the name became the family name for all Mini-14 type rifles. As of 2005, all Mini-14 type rifles are based on the Ranch Rifle design, with integral scope bases, a non-folding ghost ring aperture rear sight, and a winged front sight similar to that used on the Ruger Police Carbine. They have serial numbers beginning with 580 and are sometimes referred to as 580-series Ranch Rifles. They also have a new modified gas system designed to reduce barrel vibration and can shoot two-inch groups at 100 yards, which is 2 MOA (minute of angle) accuracy.