It remains to be seen how many challenges players will have to complete to unlock the HRM-9 SMG, but most weapons tend to require anywhere from three to eight challenges. Completing daily challenges in MW3 and Warzone or securing wins in multiplayer matches will count towards the necessary requirements.

If you’re wondering what the HRM-9 brings to the table, the devs describe it as a “light yet stable 9mm submachine gun for close-quarters combat and putting down enemies quickly.”