This is a question that is probably best asked of an attorney in your area or possibly your probation officer if you are able to contact him or her.  But off the cuff I would say that you should probably stay away from anythingthat can be classified as a "weapon" and I believe that a bow and arrow can indeed be classified as such and probably even a muzzle loader as well.  Mist statutes list "firearms" meaning any type of instrument that can be classified as a gun, and merely "possessing" it - not necessarily owning it but hold it - can be a huge problem.  Err on the side of caution here. Better safe than really sorry. Good luck.