The Arsenal SAM7UF. This 7.62x39 caliber rifle combines authentic high-quality features expected in the SAM7 Family. From its reinforced under-folding buttstock to its 14x1mm left hand muzzle threads with muzzle nut every component of the SAM7UF is engineered to provide decades of dependable and accurate service. The SAM7UF rifle is bound to become a sought-after and collectible firearm. Plum.