It's no different from anything else really. I believe that it only limits you as much as you allow it. And u/Armydude19 is right that not everyone in the AF is a pilot lol. In fact, the vast majority of personnel are NOT pilots. I'm a computer guy and have done everything from working base comm, intelligence, JSTARS, 3.5 year drill sergeant tour, deployed several times, etc. Stuttering has never been an issue other than the odd rude comment by someone when I'm having a bad day, but that's only happened...........once, maybe twice tops? As long as you put people in their place & stand up for yourself you'll be alright.