I believe, and mind you I am not a 'tacti-cool' guy, that that meat tenderizer on the front of the pistol is to serve 2 purposes;
1) Prevent the potential aggressor from using their palm to press against the muzzle and throwing the pistol out of battery, thus preventing it from going off, and
2) When pressing the pistol against someone's clothing, prevents it from sliding off of their person.
I personally have no need for such things and view it as a novel solution to a problem seldom encountered, but that is my two cents...