New business venture: Pre-Healey sales receipts with custom serial number and caliber options $500, and only $499 for green members. if only I new how to Photoshop. I've sold plenty of vehicles with a hand written non notarized bill of sale.. Even have a third party witness sign if it makes you feel better. Just build the damn things and put them in your safe all oiled up and ready to go to range day once a year. Burden of proof isn't on you and is only relevant if state crime lab has your rifle i.e. defensive situation. And if your tricked out safe queen operator AR is the first thing you go for in that type of situation you may want to go back to basics. Me? I start with whats on my hip then my boot or reload. If that doesn't fix the problem, Your pre/post AR isn't going to help much and by that point you wont have to worry about a piece of paper. To everyone's point-you can only break a law if its actually a law. No disrespect OP, just venting. Build, shoot, repeat.