Since being in the training world since 2006 I have wholeheartedly come to believe after you are good on basic firearms handling and marksmanship you NEED to know basic CQB. Anyone who says you don’t is full of shit. You live in a house, you work in a structure more than likely, you go out to eat, you goto a store,, you visit friends and family who live in structures. You need to be able to handle hallways, corners, doors, and stair. Do yourself a favor and get some skills how to fight in a structure.