"Certainly the introduction of repeating guns into the army will involve a change of the Manual of Arms. Probably it will modify the art of war; possibly it may revolutionize the whole science of war."
- letter from Oliver F. Winchester during the Civil War
A number of improvements to the Henry repeating rifle resulted in the introduction of the Model 1866 in the spring of 1867. A total of just over 170,000 rifles were produced before being discontinued in 1898. The Model ' 66 was available in rifle, carbine, and musket varieties. Like its predecessor the Henry, it was chambered for 44 rimfire cartridges. All PGW 1866 stocks are drilled for the cleaning rod.