The PDX (Personal Defense Xtreme) is a Bond Arms defensive derringer with the extended grip and 4.25-inch barrel, finished in black Cerakote for reduced visibility and improved corrosion resistance. Type: Derringer Action: Break-Action Caliber: 45 Colt / 410 Bore Capacity: 2 Year introduced: 2012, USA Weight: 23.5 oz Overall length: 6.25" Status: Active Intended use: concealed carry, backup