The reusable piercing guns are not sterilized between clients. This will increase your exposure to germs (and therefore infection), but also to blood-borne pathogens such as hepatitis. Also, the jewelry used with the piercing guns usually contains heavy metals and nickel which may result in an allergic reaction.
We suggest coming in for a consultation and check to make sure that you are built in a way that would allow for and promote healing of a specific piercing. If that specific piercing can not be done safely in a way that will facilitate healing, we can always suggest other options that would work for your body.