Jimmy, I think we all know from reading this forum that engineering and other related things we're discussing here are not your area of expertise; that doesn't make anyone think less of you for it. What does speak less of you though is when you pretend you know better anyway. Most of your rant above is just further evidence that you're over your head on this stuff, like talking about tensile strength for example. No need to get hurt feelings or keep your ego tied to a gun part.
Like Johnw said, if someone wants to make an aftermarket striker from an appropriate steel with good hardness, wear resistance, and toughness, it'd be great. Tensile strength has very little to do with it. But your buddies at LSI appear to have chosen 17-4 just based on the fact that it's popular lately for certain other gun parts, and then used misleading marketing to make it sound good. That has nothing to do with MIM, and everything to do with designing a part correctly. Sorry if that offends you but it's as straight up as I know how to say it.
