In this episode of “I Have This Old Gun,” American Rifleman TV examines a classic revolver designed by Colt's for law enforcement during the mid-20th century.

On Dec. 23, 1974, I paid $101.70 for a new Colt New Frontier .22/.22 WMR revolver. At the time I was greener than the first grass sprouts of spring. I knew next to nothing about guns in general ...