I attended the NRA Law Enforcement Armorer School held at Trinidad Colorado. For anybody who wants to learn how to tune a duty weapon and do repairs. I recommend it. I attended back in the early 80's. I went to a bowling pin match afterwards and after it was over an older gentleman approached me and wanted to know if my Colt was for sale. I asked him why he would want it. He said that mine was the only one that didn't jam. whelennut
