What I was trying to get to the bottom of was, in a nutshell: Why do the military (and also some fed agencies) seemingly distrust the "striker fired / no external safeties" approach while the same works so well for hundreds of police departments?
I don’t know that the Fed's avoid them specifically for being striker fired without safeties, but in general the question could be looked at in reverse...
"Why do so many police departments use the Glock when our military has largely steered clear of them?"
In short, a huge number of officers pay for their own pistols. The Glocks are very cost-effective and police departments don’t seem swayed by the "Buy American" concept, whereas the Fed's try to where its suitable.