Uh Wilson Combat parts are really nice. I did order a C&S drop in trigger the combat/duty one and it works great but I want to kind of do a Franken Build type thing-well not Franken build but it will be sweet. You see I want all Wilson Combat parts-everything with the exception of the slide frame and barrel but I will replace the barrel link just because and save all the old parts as backups. So speaking with Springfield today, they said they were no aloud to disclose anything about what is MIM and what is not so I asked if the stock fire control group is and they said no it is not, then they went on to say their are very few MIM parts and the ones that are, are very good for an MIM part. They have a test pistol of every type they offer and the A1 1911's are 60,000 rnds and their stainless model is over 100,000. So I guess what ever is MIM isn't all that bad. Still though I am going to eventually fit Wilson's BP trigger, sear, and disconnector, just ordered the stones, the sear stone and shim. I have read some books and watched some videos on how to do this. Shouldn't be too hard.