Whichever portion will not be Doing the job…test all of it with stock OEM elements. Occasionally aftermarket slides and triggers have too tight tolerances to operate in a P80. Thus far the Brownells and Grey Ghost (a little bit tight) have worked in my builds. I’ve read ZEV slides could https://total-bookmark.com/story18519185/glock-43-p80-no-further-a-mystery