firearms have serial numbers, not vin codes. printing an ar lower is cool and all but unless you have access to good quality material or resin, you had better have more spare lowers than mags. not to mention none of what you suggested really pertained to my question directed toward Adam. which was concerning taking a normal ar and making it “featureless”, not building or buying a new one, let alone forging documents to violate the law and wind up in prison…aside from that little bit it was a great post filled with tons of helpful info as always.