Before revision: 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 a decade later.
After revision: theIn 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 a decade later.