After the Baker entered service, more modifications were made to the rifle and several different variations were produced. A lighter and shorter carbine version for the cavalry was introduced, and a number of volunteer associations procured their own models, including the Duke of Cumberland's Corps of Sharpshooters, which ordered models with a 33-inch barrel, in August 1803. A second pattern of Baker Rifle was fitted with a "Newland" lock that had a flat-faced ring neck cock. In 1806, a third pattern was produced that included a "pistol grip" style trigger guard and a smaller patch box with a plain rounded front. The lock plate was smaller, flat, and had a steeped-down tail, a raised semi-waterproof pan, a flat ring neck cock, and a sliding safety bolt. With the introduction of a new pattern Short Land Pattern Flintlock Musket ('Brown Bess') in 1810, with its flat lock and ring-necked cock, the Baker's lock followed suit for what became the fourth pattern. It also featured a "slit stock"—the stock had a slot cut in its underpart just over a quarter-inch wide. This was done after Ezekiel Baker had seen reports of the ramrod jamming in the stock after the build-up of residue in the ramrod channel, and when the wood warped after getting wet.