Over the years, I have read in all kinds of posts about the "acursed" MIM parts. How they are preceived as cheap, fragile parts prone to breakage, or at the least - not to be depended upon in a life defending battle; let alone just range shooting. And yet recently, there is a trend of stating that they (MIM) have improved to such a point as to be just as reliable as parts made from bar stock, just less expensive for the manufacturer to produce. I know not if they are or are not, but once a preception is accepted as real than you may as well save your breath. Whatever! If an individual wishes to change out whatever parts he/she may have in his/her 1911 with bar stock/forged pieces - HOW CAN YOU TELL WHICH ONES ARE MIM? I have/know of more than one individual who does not bother to look, but automatically changes out ALL parts with whatever parts they can find that are "hard core." I have called/emailed more than one manufacturer of my 1911's, asking which ones are MIM, only to get a guess/maybe/could be answer. Yes, I have been told to look for a connecting, break away point on the part to show that it was made as part of a "tree" of the same parts, but yet also told that some companies will polish away such marks. So...how does one check/know for/of a MIM part?