Quote Originally Posted by Random View Post
Not to hijack the thread, but do you build the upper BEFORE you apply or after you get the approval? What if something (availability, etc) changes between your intent on the form and the actual implementation a year later when you get approval?
By the law you can't have the upper without the stamp. You can build the upper and give it to someone else that doesn't have a lower or a rifle that it will fit on unless that person has a Form 1 SBR stamp. You can always build it as a pistol and then make it an SBR once the stamp arrives. Also if you change things that don't jive with what the original Form 1 says you will be in violation. You can always build different uppers for the SBR as long as you keep the original upper.