I think the policy says no body piercings. I just returned from a deployment to the middle east and saw quite a few of them, makes me regret taking out my PA before I deployed for fear of someone catching me and saying something. There was actually another guy in my unit who had a PA and I wished I still had mine (woulda given us something in common to talk about and maybe led to something more??) But really it isn't enforced if it is a policy, we had a SGT (E5) who had his nipples pierced and when he had on his underarmour tshirts you could clearly see them... He never had anyone on his case about it. (Also hot guy too). But I mean you might have a totally different experience just sharing mine.