So I have a couple of builds I'd like to do as SBR's, but want to make sure I do them the right way (obviously). 1) VZ 58 - not terribly short, but short enough to be deemed "evil" by the powers that be. Right now this consists of an ORF receiver and kit. The ORF receiver is, as of this point, just a standard semi-auto receiver with no special paperwork. 2) AMD 65 - I have two options on this one. I can go with the method above, or I can just change out the existing barrel on a completed build. Thoughts either way? I assume the minute I send off the paperwork the receivers in question need to be held by my dealer... what other pitfalls do I need to avoid?