Before revision: However, all these guns (whether made from cast iron, wrought iron or their combination) were not technologically practical before URL In 1850s William Armstrong serially produced his rifled breechloaders with the same technology, and built-up, but very simple Parrott rifled muzzleloaders played a significant role in the US Civil War .
After revision: a decade laterHowever, all these guns (whether made from cast iron, wrought iron or their combination) were not technologically practical before URL In 1850s William Armstrong serially produced his rifled breechloaders with the same technology, and built-up, but very simple Parrott rifled muzzleloaders played a significant role in the US Civil War .