My son asked me what reciever we need for the 12 Ga. rifled slug barrel... I am in the habit of calling it a handi, but with a shotgun is it still a handi? I read somewhere that the heaviest 10 guage and some 12 ga were on a different type frame. So please correct me if a SB2 is ok or do we need the special heavy shotgun reciever, and what style/model would it be called if it isn't SB2. Thank you, thejanitor