I was wondering would I be able to go into a gun shop with my mom and purchase a handgun at 17 with my FOID card and with my mom who is my sponser for my FOID? Would it be acceptable since im with my parent who co-signed for my FOID, but doesnt have a FOID for herself? Or would my mom also have to apply for her own FOID card for me to acquire a handgun with her? I know you have to be 21+ to purchase a handgun, but it that also for FOID card holders at 17/18 years of age?