High Quality Content by WIKIPEDIA articles! The Ruger Carbine, or the ruger police carbine, is a pistol caliber carbine designed as a companion to the Ruger P Series pistols. As of 2007, Ruger has discontinued production citing low demand. It is a semi-automatic carbine using a blowback action. The Carbine uses the same ammunition and magazines as the Ruger P Series 9mm and .40 S W caliber pistols.