Im not a fan of the current WeatherShield but it is more rust resistant than bluing. A long time ago the WeatherShield was virtually identical in quality to Cerakote. From what ive seen its not as good anymore but it is very similar. T/C changed who applied the coating from what ive read.

Just realize the coating is not IN the bore. Its strictly external and offers ZERO bore protection. For that reason alone im not totally thrilled with the Impact. Why they don't offer a Nitride or SS Impact is a mystery. It would probably cost another $150+ for you to send off the barrel for a Nitride treatment.