With yearly releases, Call of Duty needs to change things up to keep it fresh. One of the new features in Modern Warfare 3 is Aftermarket Parts and Conversion Kits.
These parts and kits allow players to transform their favorite weapons into new threats. They increase the overall variety in the game, but unlocking them is far from easy. You’ll need plenty of XP in the process, so save up those double weapon XP tokens and start gaming.
How to unlock the Conversion Kit in MW3
Aftermarket Parts and their Conversion Kits are unlocked via challenges once a weapon reaches max level. If you’re looking to upgrade your weapon with Conversion Kits, you’ll first need to get it to max level just to unlock its respective slots. The fastest ways to level up guns should speed up this process, and you’ll also need to complete certain challenges to unlock the Conversion Kits that will go into the slots that share the same name.
What are Conversion Kits in MW3?
Conversion Kits are attachments that transform a weapon while defying the laws of physics. Conversion Kits completely change the weapon at times, like the JAK Ferocity Carbine Kit for the Renetti, which turns it from a burst pistol into an SMG.
It’s worth grinding every gun in the game to maximize their level because new Aftermarket Parts will be added over time, and you never know which one will be overpowered at launch and take over the meta when it releases. Here are all the Aftermarket Parts and weapon kits currently available in MW3.
Aftermarket Parts and Conversion Kits in MW3 season zero
JAK Raven Kit (MCW)
“Versatile and modular, this .300 conversion of the MCW can be adapted to hit hard in nearly every combat scenario.”
- How to unlock: Season zero, week one challenge
This is an example of one such kit that does not improve the gun. Stick with the regular MCW build.
JAK Heretic Carbine Kit (MTZ-762)
“This powerful, 7.62 AR was crafted to deliver exceptional damage with moderate recoil.”
- How to unlock: Armory Unlock
Broodmother .45 Kit (WSP-9)
“A high-damage conversion kit that rides the line between SMG and AR with hard-hitting .45 Auto rounds.”
- How to unlock: Armory Unlock
The WSP-9 already feels like an SMG/AR hybrid, and this kit leans into that to make it even more so.
JAK Annihilator Bullpup Kit (Pulemyot 762)
“A modified, bullpup LMG that provides superior maneuverability while still delivering heavy and consistent fire.”
- How to unlock: Armory Unlock
XRK IP-V2 Conversion Barrel Kit (COR-45)
“This carbine conversion kit for the COR-45 allows for optics and underbarrel attachments. It also introduces binary fire which effectively doubles the fire rate.”
- How to unlock: Armory Unlock
JAK Ferocity Carbine Kit (Renetti)
“This heavy carbine kit converts the Renetti pistol into a compact and maneuverable SMG. Allows for optics, stocks, and underbarrel attachments.”
- How to unlock: Armory Unlock
This kit effectively turns the Renetti, a burst pistol, into an SMG.
JAK Nightshade Rifle Kit (DG-58 LSW)
“A 5.8x42mm assault rifle that hits hard and doesn’t ask questions. In the right hands, this rifle can win almost any engagement.”
- How to unlock: Season zero, week two challenge
WSP Akimbo Brace Stock Kit (WSP Swarm)
“A brace stock used to keep the weapon stable when firing akimbo.”
- How to unlock: Season zero, week three challenge
MCW 6.8 Full Auto Conversion (MCW 6.8)
“Converts the MCW 6.8 into a full-auto marksman rifle.”
- How to unlock: Armory Unlock
Cronen INTLAS MSP-12 (Optic)
“A quick and snappy dot optic with an integrated laser for added accuracy”
- How to unlock: Armory Unlock
INTLAS CAS-14 (Optic)
“This 2.5x optic is ideal for medium ranges and comes with an integrated laser.”
- How to unlock: Armory Unlock
Aftermarket Parts and Conversion Kits in MW3 season one
New Conversion Kits will be added throughout each season, mostly through weekly challenge completions. Here are all the new ones added in season one. But remember, to use a Conversion Kit on a specific weapon, that weapon must be max level.
JAK Purifier
“Equip an underbarrel flamethrower” on the MCW, MTZ-556, Holger 556, DG-56, SVA 545, RAM-7, MTZ-762, BAS-B, Sidewinder, and Riveter.
- How to unlock: Season one battle pass
JAK Headhunter Carbine Conversion (Rival-9)
“Rival Assault Rifles with this three-round burst conversion kit that excels at midrange combat.”
- How to unlock: Season one, week one weekly challenge
JAK Bullseye (Optic)
“Very low-profile dot Optic. Limited interference from framework offers an exceptionally clear sight picture.”
- How to unlock: Season one, week two weekly challenge
JAK Beholder Rifle Kit (TYR)
“A long and heavy barrel that offers the best increase to range. Improves recoil control and damage range, converting this Handgun into a single-shot Rifle.”
- How to unlock: Season one, week three weekly challenge
KR INTLAS LSJ-3 (Optic)
“A 4x optic with an integrated laser for faster targeting and accurate results.”
- How to unlock: Season one, week four weekly challenge
JAK Signal Burst (Holger 556)
“A conversion kit designed for accuracy and controllability with four-round bursts.”
- How to unlock: Season one, week five weekly challenge
The Ettin (AMR9)
“Available for the AMR9 SMG, this kit creates two stacked barrels that fire simultaneously. This offers twice as much down-range damage at the cost of some accuracy.”
- How to unlock: Season one, week six weekly challenge
JAK Thunder LMG Kit (Sidewinder)
Dominate lanes and hold objectives with this LMG conversion kit for the Sidewinder Battle Rifle that brings a large capacity magazine and ramps in fire rate the longer you hold down the trigger.
- How to unlock: Sector A21 in the Season One battle pass
JAK BFB
A compensator attachment for “many Assault Rifles, Submachine Guns, Battle Rifles, Marksman Rifles, and Sniper Rifles.”
- How to unlock: Sector A21 in the Season One battle pass
JAK Glassless Optic
“This small, glassless reflex Optic offers a crisp and clear sight picture for snappy target acquisition.”
- How to unlock: TBA
This article will be updated when more Aftermarket Parts and kits are added to MW3.
