I have an antique 22long/22xlong rifle. If I was going to cut the barrel to less than 16 inches I would have to fill out all the paper work.
Now for the question
Because of the age of the gun there is no serial number. What would I put in the area where it requires a serial number on the paper work?
p.s.this is purely hypothetical, there is no way I would cut down this rifle, While it is not worth a great deal it is a great shooter has has a lot of sentimental value to me.