After detail stripping the new Government and closely examining each part, I don't think any of them are MIM, not even the slide stop, thumb safety, or the grip safety. So I called Colt, and the rep said they did try a few MIMs earlier, but went back to all cast parts. I'm not 100% on this since I haven't seen them make one of these guns with my own eyes. I'm just saying that my conclusions about the parts agree with what the rep said.