Originally Posted by gunzo
If ya own a Toyota, the engine has MIM connecting rods in it.

What's this got to do with a 1911? Not much really, considering an internal combustion goes through a gazillion more cycles, stresses, & heat changes than a 1911 ever will.

MIM is great or terrible like any other process. It depends on who's doing it.

Yes, it's very true that MIM quality is very dependent on who produces it.

MIM rods, aircraft engine parts, medical devices, etc., are all tested by Xray, magnaflux, mag particle inspection for cracks or porosity, 100%, so defective parts are almost nil getting used & installed............not so with gun parts.

And yes, I agree with MOGC also............MIM tends to fail early in life with no warning, no preliminary cracks, no deformation. When it goes, it goes with no warning.

MIM can be good but really should not be used for parts such as slide stops, for example. There's just no doubt that for hard, frequent, continuous use guns, forged parts have a less likely to fail scenario.....................but for the everyday Joe that shoots 3 boxes of ammo a year in a 1911, most will work.........until they don't.

The 1911 is a very different animal than a Glock which also uses a lot of MIM parts, with a generally very much lower failure rate. Or maybe they just have better suppliers, I dunno.

MM