CAJUNLAWYER, I've a few remarks to make...

First, there is no need to be a bully. If grip frame and trigger housing were inseparable, and this "fact" was explicitly mentioned (or even hinted to), there would be no problem understanding. But, the reason S&W not even hinted to this is because... see Second below

Second, what I do not understand now is why you take a great length to explain something which is not true. My close examination of an M&P BG380 proved the trigger housing IS removable from the polymer grip frame by driving two pins out, just like on the original BG380. I have found a video (on a different subject) where the guy shows, among other things, how it is done - look at the vid starting at about 7:05
https://www.youtube.com/watch?featur...&v=MGviBwX0pOY