I have had the 460 conversion on my Springfield 1911 in stainless steal for about seven or eight years now I broke a bunch of a little  I have had the 460 conversion on my Springfield 1911 in stainless steal for about seven or eight years now I broke a bunch of the little Mim parts over the years but I've shot it quite a bit in all in all everything is held up very well.  Off the top of my head parts that broke were the thumb safety, hammer. That was just a good excuse to replace them with better parts. Our use the gun while hiking at Yellowstone and felt pretty secure With it.👍