The Pedersoli Missouri River Hawken Rifle is a .45 caliber percussion model that is a reproduction of the plains style rifle manufactured from 1840 to 1865. The Pedersoli Missouri River Hawken features the classic lines and incredible performance of the .45 caliber Missouri Rifle. The Missouri River version features a precision-rifled, rust brown finished 34" octagonal barrel with six-groove rifling and a tight 1:24" twist rate to deliver superior downrange precision with sabot and conical bullets alike.