Editing Semi-automatic firearm (section)

===Blowback semi-automatic===

In 1903 and 1905, the [[Winchester Repeating Arms Company]] introduced the first semi-automatic [[Rimfire ammunition|rimfire]] and [[Centerfire ammunition|centerfire]] rifles designed especially for the civilian market. The [[Winchester Model 1903]] and [[Winchester Model 1905]] operated on the principle of [[Blowback (arms)#blowback|blowback]] in order to function semi-automatically. Designed entirely by [[T. C. Johnson]], the Model 1903 achieved commercial success and continued to be manufactured until 1932 when the Winchester Model 63 replaced it.

By the early 20th century, several manufacturers had introduced semi-automatic .22 sporting rifles, including [[Winchester Repeating Arms Company|Winchester]], [[Remington Arms|Remington]], Fabrique Nationale and [[Savage Arms]], all using the direct blow-back system of operation. Winchester introduced a medium caliber semi-automatic sporting rifle, the [[Winchester Model 1907|Model 1907]] as an upgrade to the Model 1905, utilizing a blowback system of operation, in calibers such as [[.351 Winchester Self-Loading|.351 Winchester]]. Both the Models of 1905 and 1907 saw limited military and police use.