Honestly, the JAK Purifier is just a meme weapon in MW3, so the only reason you’ll want to unlock it and get kills is for Season 4. Or because you just want to piss off your opponents. Anyone would think an underslung flamethrower would be a beast, but it just kind of isn’t.How to unlock the JAK Purifier in MW3Initially, the JAK Purifier was only able to be unlocked in MW3 during Season 1 of the battle pass. However, now, in MW3 Season 4, it rears its ugly, flaming head once more. To unlock it, you must simply complete daily challenges with it selected from your armoury unlocks.Open up your challenge menu on the right of the screen. Here you can select armory unlocks and select the JAK Purifier as the one you want to start working towards. You will then have to start completing daily challenges until you have earned enough to unlock them. Screenshot: PC InvasionThis shouldn’t take long. Simply complete the various ones you have for the day and then…