He is not allowed to possess firearms until 5 years after release from incarceration or public supervision, i.e. parole or probation, which ever is later. After that 5 year period, he will only be allowed possession in his home. He still can't purchase one. As long as you don't allow him to handle or be in control of a firearm (loaded or unloaded) you and he will be OK. If you do, then you could be in trouble as well. You can't allow him access.