One of two Colt Detective Special styled snubs (the other being the Agent) manufactured with an aluminum-alloy frame. The Cobra was a medium sized or D-frame Colt revolver manufactured in .22 and .38 caliber and available in two and three inch barrel lengths. The Colt Cobra was distinct from the Colt Agent in  having a larger grip frame length.  Jack Ruby is reported to have used a Cobra .38 Special to kill Lee Harvey Oswald