If it has never been assembled then it is an other/receiver. There is no other way to designate it. A stripped lower is just a stripped lower. If someone marked it on a 4473 as a rifle then they didn't do it right. The problem with one that has been passed around that much would be more of not knowing if it was ever assembled or not. Not how it was designated on a 4473. I have never heard of a licensed dealer who would mark a stripped lower as anything other than other/receiver. How could you possibly look at it and think it was a long gun or hand gun. It is not even capable of shooting in that form.Yeah, but as the 2nd, 3rd or 4th owner, I’m at the original 1st buyers mercy to know the truth how my unmarked receiver was originally designated on that 1st buyer’s 4473 form, that is if it was sold to me assembled with 10 inch barrel and sig brace.