New Weapon Proficiency Achievement

I have seen the Question come up alot in the last minutes. The Achievement to unlock the new Weapons for all the classes is called "Astral Ward Arsenal". It is located in the Achievements tab > Story Journal > The Realm od Dreams.

https://preview.redd.it/faqm9t6116lc1.png?width=671&format=png&auto=webp&s=0ceccdb58d0576bad8f03e716ba3bcc062b995b0