Designed for use by the US military as a light carbine in the 1940's, the .30 carbine was used in the venerable M1 Carbine and the full auto M2 version. The gun of choice for many soldiers in WW11 the M1 is still very popular today. Ruger also offers the .30 Carbine in their popular Blackhawk revolver and new M1's are available from Auto-Ordnance.