Even if there is a law on the books prohibiting 'ghost' or untraceable firearms' manufacture, ANyTHING we can do to inhibit this shadow market in products specifically designed to KILL is a step in the right direction. The 'unenforceable' argument is tired and specious...almost ALL laws are broken. Does that mean we shouldn't have any. Of course not. We all need to be sick and tired of the ridiculous claim that any steps toward the regulation ...REGULATION...of firearm ownership is no different than driving rules and general safety and public welfare requirements for ANY good or service. Let's all untwist our boxers and be reasonable.