The M1 Garand was the first semi-automatic rifle to be generally issued to the infantry of any nation. Called "the greatest battle implement ever devised" by General George Patton, the Garand officially replaced the bolt-action M1903 Springfield as the standard service rifle of the United States Armed Forces in 1936 and was subsequently replaced by the selective fire M14 in 1957. However, the M1 continued to be used in large numbers until 1963 and to a lesser degree until 1966.
I got all that from Wikipedia.
I've made a few Marshmallow Guns in my time too. For the most part they looked like this: