I bought the argument on "mim" parts for some time and then I bought a .45 that had them and I got my views changed a little. That .45 is one of the slickest revolvers I have ever owned. It not only has "mim" parts but the key lock(gasp) also. Time will tell on how they wear but so far I am for giving them some slack because of this .45. We will see how it goes in the future. james