Did you read the part where several had broken in a low # release product.
I'm not sure why you thought either of us missed that? That is what we're talking about here after all...
Sig obviously has a design or manufacturing issue with their 365 striker, hopefully they'll address it. I don't think it's accurate or informed though to say it's because they used MIM for the striker, it would be more realistic to say it's because they didn't design it correctly for an MIM part, or there's something about their MIM process that allows a few bad parts to wind up in customer guns. Keep in mind Glock has been using the MIM process for many years for their strikers with excellent results.
A good tool steel striker could certainly be more durable, as well as lighter. But that's not what LSI is doing with their striker. Johnw's comments on the material choice are spot on; I'm guessing he knows a bit about steels too.
