How to Get JAK Signal Burst in MW3

The JAK Signal Burst is a conversion kit attachment that was introduced to Call of Duty: Modern Warfare 3 during Season 1. The Aftermarket part will change the full-auto Holger 556 assault rifle into a four-burst shot, making it more accurate and viable for close-quarters combat.

How to Unlock JAK Signal Burst in MW3

The JAK Signal Burst can be unlocked by completing five Season 1 Week 5 challenges. All five of the challenges do not have to be done in the same week, but must be done before Season 1 is over to receive the Aftermarket conversion kit.

There are a total of 20 Week 5 challenges among multiplayer, Zombies, and Warzone battle royale modes. Only five of the 20 challenges need to be completed to get the JAK Signal Burst, and all five can be done within any mode. Here are all the Season 1 Week 5 challenges that can be completed:

Multiplayer

• Get 30 Operator Kills while Aiming Down Sights with a Recommended Weapon
• Get 30 Operator Kills with the Holger 556
• Get 30 Operator Headshot Kills with the Holger 556
• Get five Operator Fury Kills with a Recommended Battle Rifle
• Get 30 Operator Kills with a Recommended Battle Rifle
• Get 30 Operator Kills with Sights Equipped to a Recommended Assault Rifle
• Get 10 Operator Longshot Kills with the Holger 556

Zombies

• Get 750 Kills while Aiming Down Sights with a Recommended Weapon
• Get 250 Kills with the Holger 556
• Get 250 Critical Kills with the Holger 556
• Get three Mimic Kills with a Recommended Battle Rifle
• Get 300 Kills with a Recommended Battle Rifle
• Get 250 Scoped Kills with a Recommended Assault Rifle
• Get 250 Kills with a Pack-A-Punched Holger 556

Warzone Battle Royale

• In Warzone Urzikstan, get 10 Operator Kills in the North-West Region (Resort, Power, Seaport, Cargo)
• In Warzone Urzikstan, get 10 Operator Kills in the Southern Region (City, Suburbs, Manor)
• In Warzone, complete 15 Contract(s)
• In Warzone Urzikstan, get 10 Operator Kills in the Eastern Region (Military Base or Farms)
• In Warzone Urzikstan, get 10 Operator Kills in the Central Region (Old Town, Low Town)
• In Warzone, open 50 Loot Caches

For more on Modern Warfare 3 Aftermarket parts, please check out our guide on how to get the KR Intlas LSJ-3 scope to use with a variety of weapons in the game.