Tattoo after USMC bootcamp?

i am wondering if this is allowed or not. going into boot camp i will be 17 getting out i will be 18 the tattoo i want is a confederate flag tattoo i am proud of where i come from and by NO means am i racist or the whole kkk thing. so is this allowed? i mean i read a story about a kid being rejected from the marines cause he had one. but i would already be out of boot camp so is it ok?