In a sense, maybe you could call refurbished missiles "not new":

https://www.thedefensepost.com/2024/01/24/us-army-stinger-missiles/

The US Army has refurbished 1,900 Stinger missiles once deemed “unserviceable.”

The effort saved approximately $50,000 per round and added 10 years to the anti-aircraft missile’s service life.

Moreover, the missile has been equipped with new technology to deal with unmanned aerial systems, “a threat that Stinger was not originally designed for decades ago,” the US Army said.

I mean, they haven't been fired, but...