Cobra's Big Bore derringer chambered for 45 Colt and 2.5-inch 410 shotshells — the most powerful Cobra Firearms derringer configuration. Stainless frame with a 2.75-inch barrel. Type: Derringer Action: Break-Action Caliber: 45 Colt / 410 Bore Capacity: 2 Year introduced: 2006, USA Weight: 14 oz Overall length: 4.65" Status: Active Intended use: concealed carry, backup