A new Conversion Kit has been added in the fourth week of Modern Warfare 3 Season 3, and it's for a Battle Pass weapon from the season.
HOW TO UNLOCK THE NEW BP50 JAK REVENGER KIT IN WARZONE 3.. (WEEK 4 AFTERMARKET SUPPLEMENT)
The BP50 is a decent AR in MW3, but the Season Three Week Four unlockable changes the weapon into an entirely different weapon class, so it’s worth unlocking to see if it’s a beast in multiplayer or even Warzone matches.
Here's everything you need to know about the new JAK Revenger Kit in MW3.
The JAK Revenger Kit is an Aftermarket Part and Conversion Kit for the BP50 assault rifle. This particular Conversion Kit transforms the BP50 AR into an SMG with a faster rate of fire and larger magazine than the base AR, along with higher mobility, but lower damage and range.