So I'm in a Hazmat class all week with people from various public safety agencies around central FL, and one of them is a SWAT cop with a county Sheriff's department (should I say who, or is that not acceptable?). Anyway, we were talking guns on a break since he was wearing a Kimber 1911 and I was surprised to see a single action in a cop's holster. He was telling me that of the 30 pistols they had bought (for a great price including tac light) that 18 of them had been returned to Kimber for peening of the firing pin hole. He said no guns had slam-fired but one did separate the firing pin, spring, and back plate when the pin locked forward amd the plate moved downwards. He also said there had been failures of the (MIM) ambi safety levers due to cracking. He wasn't sure how many of those had occured. In talking with him I get the impression he knows more than the average guy about MIM and guns in general. He also said he asked for his Glock back and was told no. FWIW, ammo is 200gr +p Gold Dot. He was carrying in a Serpa OWB.