I was looking at the ar57 uppers and saw you can get it as a complete 11" SBR, which looks like loads of fun.
Question is do you have to have the paperwork done befor buying the upper or get the upper, send it papers, let upper sit in the safe untill approved?
Question is do you have to have the paperwork done befor buying the upper or get the upper, send it papers, let upper sit in the safe untill approved?