Pedersoli™ 1841 Mississippi Rifle - .54 Caliber RifleThe Pedersoli 1841 Mississippi Rifle is a 54 caliber percussion model that is a reproduction of the rifle manufactured at Harpers Ferry from the 1846 to the 1855. These rifles were originally made in . 54 caliber, though many were later modified to . 58. Officially known as the Model 1841 U. S. percussion rifle, this firearm became known as the "Mississippi Rifle" when it was used by a regiment of Mississippians commanded by Jefferson Davis during the