Under the law, it is the current "standard of performance" which prevails. They can say anything they want, but they can not claim all guns without locks are inherently unsafe.

Some Mercedes have a whole battery of built in safety features like roll bars that pop up when the car rolls, self leveling suspensions, avoidance sensors, etc which far exceed typical for the industry which 99.9% of cars do not have. Nobody could complain that products which do have the industry standard safety features were inherently defective because they did not come up to the highest level of a small percentage of products.