The most unusual production Blackhawk chambering — the .30 Carbine cartridge from the M1 Carbine rifle. The 7.5-inch barrel is necessary to burn the rifle powder in the pistol cartridge. Notorious for its dramatic muzzle blast and flash, earning the nickname 'the streetlight eliminator.' Type: Revolver Action: Single-Action Caliber: 30 Carbine Capacity: 6 Year introduced: 1968, USA Weight: 44 oz Overall length: 13" Status: Active Intended use: Collector, Recreational, Novelty