The system is also capable of detecting firearm projectiles, but is specifically tuned not to react. Regardless of what calls may come, there won't be a change

The system is also capable of detecting firearm projectiles, but is specifically tuned not to react. Regardless of what calls may come, there won't be a change because the designers and the customers have already considered that possibility and specifically excluded it as not being worth the risk. This is not a case of being too cheap or short-sighted to do something.