Aftermarket Parts

Aftermarket Parts are an attachment type featured in Call of Duty: Modern Warfare III.

Aftermarket Parts can range from simple attachments to full-on Conversion Kits for weapons. They can be unlocked via Weekly Challenges or Armory Unlocks Challenges in Multiplayer, Zombies and Call of Duty: Warzone 2.0. In Call of Duty: Warzone Mobile, they can instead be bought at the Arsenal Store.

List of Aftermarket Parts[]

Conversion Kits[]

Kit	Weapon	Description
JAK Raven Kit	MCW	Versatile and modular, this .300 conversion of the MCW can be adapted to hit hard in nearly every combat scenario.
JAK Heretic Carbine Kit	MTZ-762	This powerful, 7.62 AR was crafted to deliver exceptional damage with moderate recoil.
JAK Annihilator Bullpup Kit	Pulemyot 762	A modified, bullpup LMG that provides superior maneuverability while still delivering heavy and consistent fire.
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.
MCW 6.8 Full-Auto Conversion	MCW 6.8	Converts the MCW 6.8 into a full-auto marksmen rifle.
Broodmother .45 Kit	WSP-9	A high-damage conversion kit that rides the line between Submachine Gun and Assault Rifle with hard-hitting .45 Auto rounds.
XRK IP-V2 Conversion Kit	COR-45	This carbine conversion kit for the COR-45 allows for optics and underbarrel attachments. The binary trigger increases fire rate by firing a round on trigger pull and another on release.
WSP Akimbo Brace Stock	WSP Swarm	A brace stock used to keep the weapon stable firing akimbo.
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.
JAK Headhunter Carbine Conversion	Rival-9	Rival Assault Rifles with this three-round burst conversion kit that excels at mid range combat.
JAK Beholder Rifle Kit	TYR	A long and heavy barrel that offers the best increase to range. Improves recoil control and damage range.
JAK Signal Burst	Holger 556 DM56	A conversion kit designed for accuracy and controllability with 4-round bursts. Adaptable for close quarters scenarios with an integrated Laser that improves hip fire and tac stance accuracy.
JAK Ettin Double Barrel Kit	AMR9	Two stacked barrels that fire simultaneously. This offers twice as much down-range damage, but it impacts accuracy.
JAK Thunder LMG Kit	Sidewinder	Dominate lanes and hold objectives with this LMG conversion kit that brings a large capacity magazine and ramps in fire rate the longer you hold down the trigger.
JAK Tyrant 762 Kit	Longbow	This caliber Conversion Kit swaps out the receiver and magazine to accommodate 7.62 BLK ammunition for a harder-hitting, subsonic weapon.
JAK Maglift Kit	Haymaker	With a new binary trigger and reinforced magwell to accommodate the extra large .410 drum mag, this kit is a room-clearing machine.
JAK Burnout Kit	Holger 26	Introduces an adverse fire functionality that pushes the weapon to extreme fire rates but hurts accuracy as the barrel overheats.
JAK Backsaw Kit	Holger 556	Gives the Holger 556 a high capacity drum magazine and a side-by-side double barrel, allowing for the weapon to fire two bullets at once.
JAK Outlaw-277 Kit	BAS-B	This Conversion Kit transforms the BAS-B into a lever-action rifle, slowing fire rate but vastly improving accuracy for deadlier precision. Has a faster fire rate from the hip for dealing with close range threats that require less accuracy.
JAK Shadow Titan Kit	Bruen Mk9	Converts the Bruen Mk9 into a compact and integrally suppressed light support weapon chambered in 300 blackout.
JAK Jawbreaker	KV Broadside	Converts this shotgun into a hard-hitting, automatic battle rifle.
JAK Revenger Kit	BP50	This conversion kit turns the BP50 into a CQC legend. 9mm caliber conversion, shortened receiver, and high-capacity magazine.
JAK Wardens	Lockdwood Mk2	Relive the glory days, stir up the hornet's nest, and takedown your enemies, leaving no loose ends with these museum-worthy akimbo lever-action shotguns.
JAK Atlas Kit	AMR9	Converts the AMR9 into an extremely lethal and accurate 5-round burst carbine chambered in 5.56.
JAK Patriot	M16	Converts the M16 into a fully automatic rifle with a heavy ported barrel built to provide superior recoil control and firing aim stability.
JAK Decimator	Lachmann Shroud	This modification allows the Lachmann Shroud to fire in full auto.
JAK Intimidator	Renetti	Take more deliberate shots with this modification that changes the Renetti to a semi-auto weapon.
JAK Harbinger Kit	M4	This .50 Cal conversion kit for the M4 is an extremely deadly, quick-kill weapon. The slow fire rate, drop in bullet velocity, and a significant increase in recoil will require a careful hand.
JAK Requiem	Kastov 762 Kastov 545	A counter-balanced rifle system designed to completely eliminate vertical recoil.
JAK Scimitar Kit	FJX Horus	Improved range and recoil are standard with this aftermarket kit which also unlocks the use of a high-capacity drum mag for the FJX Horus.
JAK Thumper-656	RGL-80	An improved long barrel for an infantry-carried grenade launcher. Fires projectiles at higher velocities and distances. Compatible with a wider variety of launcher projectiles.
JAK Volkh	KV Inhibitor KVD Enforcer	A meticulously crafted stock and receiver modification that updates the weapon to fire a two-round burst at minimal MOA dispersion, making every trigger pull count.
JAK Gunslinger	Basilisk	A frame and cylinder conversion that allows the revolver to hold eight rounds of .357 ammunition with an exceptional increase to rate of fire and a near instantaneous trigger action.
JAK Widemouth Barrel	MORS	A widemouth barrel crafted to accommodate magnetic ball bearings that shatter upon firing, creating a barrage of small and lethal projectiles.
JAK Cataclysm	RPK	Command the battlefield with this .50 Cal conversion kit for the RPK. Slow yet powerful with a high-capacity drum mag, this kit is your enemy's nightmare.
JAK Protean	RAAL MG	This conversion kit turns the RAAL into a highly adaptable prototype weapon with a telescoping barrel that can be toggled between full-auto and semi-auto fire, offering suppressive fire and precision in the same weapon.
JAK Deathmarch	BAL-27	This aftermarket part replaces standard ammo with high-voltage power cells and the barrel with a photonic scatter barrel. Fire a spread of lethal laser blasts that take down enemies at short range.
JAK Devastators	Reclaimer 18	Dual-wield Reclaimer 18 shotguns and become a mobile artillery barrage with this aftermarket part. Accuracy and recoil control are minimal, but destruction is maximized.
JAK Salvo	KATT-AMR	A sniper modification that fires anti-materiel explosive rockets that deal significant explosive damage.
JAK Lance	MX Guardian	A pressurized magazine that fires three ballistic rivets, one per magazine rotation. Pressure builds while the weapon is idle until the maximum output is reached. At critical pressure, velocity, and precision are vastly improved.
JAK Voltstorm	Stormender	High-voltage electricity is cycled through copper coils and discharged in a lethal bolt capable of hitting multiple targets.

Optics[]

Name	Compatible	Description
Cronen Intlas MSP-12	All (except Launchers, Renetti & WSP Swarm)	A quick and snappy dot optic with an integrated laser for added accuracy.
Intlas CAS-14	All (except Launchers & Handguns)	This 2.5x optic is ideal for medium ranges and comes with an integrated laser.
KR Intlas LSJ-3	All (except Launchers & Handguns)	A 4x optic with an integrated laser for faster targeting and accurate results.
JAK Bullseye	All (except Launchers & Handguns)	Very low-profile dot Optic. Limited interference from framework offers an exceptionally clear sight picture.
TPS Incendio Reflex	All (except Launchers & Handguns)	Utilizing special imaging tech, this compact optic highlights the thermal signatures of targets while maintaining the clear sight picture of a standard optic.
JAK Glassless Optic	All (except Launchers & Handguns)	This glassless reflex optic offers a projected dot and state of the art stabilization technology that reduces visual recoil while firing.
XTEN Intlas AS-7	Light Machine Guns,Marksman Rifles,Sniper Rifles	A 6x optic with a built-in laser for a significant boost to accuracy.
JAK NRG-IV Optic	All (except Launchers & Handguns)	A dot optic designed for mid-range combat and precise shots.

Muzzle[]

Name	Icon	Compatible	Description
JAK BFB		Assault Rifles, Battle Rifles, Submachine Guns, Light Machine Guns, Marksman Rifles, Longbow	Go Loud. This compensator borders on excessive but offers a phenomenal reduction to recoil but significantly increased muzzle report, giving up your position and facing on enemy radar.
JAK BFB		Sniper Rifles (except MORS & Longbow)

Underbarrels[]

Name	Compatible	Description
JAK Purifier	MWIII Battle Rifles, MWIII Assault Rifles (except BAL-27 & FR 5.56), Riveter	An underbarrel flamethrower. What more needs to be said? Burn it all down.
JAK Limb Ripper	MWIII Battle Rifles, MWIII Assault Rifles (except BAL-27 & FR 5.56), Riveter	Unrivaled at creating close-quarters carnage, this underbarrel chainsaw makes quick and messy work of anyone foolish enough to stand in your way.
JAK Slash	All (except Minibak, KATT-AMR, SP-R 208, Launchers, Handguns)	This underbarrel vertical grip doubles as a combat knife, replacing your melee attack with a lethal slash.

Stock[]

Name	Icon	Compatible	Description
JAK Cutthroat		MCW, MTZ-556, MTZ-762, MTZ Interceptor, M4, M16, 556 Icarus, FTac Recon, FSS Hurricane, Riveter, AMR9, Superi 46	This 3D-printed stock provides an unrivaled combination of speed and stability while aiming down sights. Compatible with weapons from the following platforms: MCW, MTZ, M4, & AMR9.

Barrel[]

Name	Icon	Compatible	Description
Photonic Charge Barrel		MORS	This hyper-advanced barrel is more than simply a barrel. Holding the trigger charges the rifle and releasing fires a single, high-power energy projectile.

Trivia[]

Though the XTEN Intlas AS-7 was added to Modern Warfare III in Season Three, it can be unlocked in Warzone Mobile during Season Two, though it was not accessible in either games at the time.
The .338 Magnum Round Nose (or .338 Mag Round Nose) Ammunition of the KV Inhibitor is classified as an Aftermarket Part in Warzone Mobile, which is not the case in Call of Duty: Modern Warfare III and Call of Duty: Warzone 2.0.