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Tyler, the UPC code of of recent manufacture. It usually takes a serial number to verify this with Sig Sauer. You can try Buds Customer Service to see if they have insight on this. I would venture to say yes, but can't be 100% sure. LiveChat (available from 9AM to 9PM 7 days a week), the "Contact Us" tab at the top of the page, or phoning at (859) 368-0371 (available 9AM to 9PM EST Monday through Friday).

It would depend on the manufacture date of the particular gun. I would go ahead and purchase. If it did not have the upgrade I would send it in link on upgrade https://www.sigsauer.com/support/p320-voluntary-upgrade/

Upon further research sig stopped production on 9 Aug 2017 and as far as I could see has not restarted production so the odds of it having a updated trigger are very slim Sig says the old triggers are safe and that it is up to the owner to decide if they want a upgraded trigger or not here is a good article http://www.thetruthaboutguns.com/2017/08/jon-wayne-taylor/sig-sauer-stops-production-of-p320-voluntary-safety-upgrade-details-on-monday/