Crouching while flying has acquired a lot of myths around it over the years. I have proved all of them wrong with in-game testing: Myth 1: crouching while flying makes you a harder target. Holding crouch while flying will lower your viewpoint in first person, and you will be able to squeeze through windows and other narrow passages. But it will not affect your 3rd person model, you will still appear standing to enemies, and you will be just as easy to hit. Your character will only lower his/her head slightly when you shoot. Myth 2: crouching while falling makes you land on on your feet faster. It doesn't. It will only appear that way, because your own view lowers as you press crouch. It also doesn't make you crouch faster when you finally land. For you, it will appear as if you have landed already crouched, but your character model will first land, and only then crouch as if you were standing to begin with. Myth 3: holding crouch while flying (with Drifter Jets) increases your speed. I have tested it, and this is not true, both when flying normally and skimming along ground. To summarize, the only point in holding crouch while falling is if you actually plan to crouch after you land. Edit: as a sidenote, confirmed that slugs increase CoF by 75% for hip firing. Haven't tested ADS, most likely also true.