isn't exactly taking the world by storm and has been met with its fair share of criticism - something that can also be said of rival
- but there are still plenty of people playing and progressing. If you are one such player trudging through the long process of levelling up your favorite weapons, you'll be glad to hear that a method to speed the process up has been discovered.
As described in a guide on DownSights, it turns out that the key to unlocking those weapon attachments and earning the 150,000 XP needed per weapon at nearly double the usual rate is to play Zombies - at least this will give players a reason to do so, as the content-bare and half-baked Zombies mode is one of the major points of contention with the game.
