Not sure if you mean the pics of what happens when you attach a rifle barrel to a shotgun receiver or what. But I did not find a way to discern an SB1 frame from a SB2 in the FAQ's. If you could be more specific that would be great. I can and will call H&R's customer service tomorrow if I need to but I thought someone might be able to give me an easy way to ID them without the phone call.
Thanks for the help.