An SMG variant of the M4 has made its way to Call of Duty: Modern Warfare 3. The AMR9 is a fast-firing weapon with minimal recoil and plentiful customization options. It's also a fairly sluggish weapon, featuring the worst sprint to fire delay out of all SMGs. It also aims slowly, making this a less-than-ideal gun for aggressive players.

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Fortunately, most of these issues can be fixed through attachment. This guide will showcase two builds for the AMR9—a suppressed SMG build and an LMG conversion build—that either focus on the weapon's strengths or fix its most glaring weaknesses.

Updated May 9, 2024, by Charles Burgar: The AMR9 received a new conversion kit with the Season 3: Reloaded update. We have updated this guide to include a build for the JAK Atlas Kit, a variant of the AMR9 that turns it into a five-round burst SMG with a fairly short TTK at close range.

Stealth AMR9 Weapon Build

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AMR9 Build

Attachment

Pros And Cons

MK. 3 Reflector

(Optic)

  • Precision Sight Picture
  • N/A

Nimbus-6 Integrated Suppressor

(Barrel)

  • Undetectable by Radar
  • +Bullet Velocity & Range
  • -Sprint to Fire Speed
  • -Aim Down Sights Speed

SL Skeletal Vertical Grip

(Underbarrel)

  • +Aim Down Sights Speed
  • +Vertical Recoil
  • +Gun Kick Control
  • +Sprint to Fire Speed
  • -Hipfire and Tac Stance Spread
  • -Horizontal Recoil

50 Round Mag

(Magazine)

  • +Magazine Ammo Capacity
  • -Aim Down Sights Speed
  • -Reload Quickness
  • -Aim Walking Speed
  • -Movement Speed

Phantom Grip

(Rear Grip)

  • +Sprint to Fire Speed
  • +Aim Down Sights Speed
  • -Flinch Resistance

This build aims to make the AMR9 suitable for a close-range stealth build. We use the Phantom Grip and SL Skeletal Vertical Grip to greatly reduce the weapon's ADS and sprint to fire values while only dropping our flinch resistance. We then use the Nimbus-6 Integrated Suppressor to make this a stealth build. Since SMGs struggle at longer distances, we use the 50 Round Mag attachment to give some much-needed flexibility with weapon accuracy. Throw on your favorite optic to complete the build.

This weapon's new sprint to fire delay is 186ms, a competitive delay with most SMGs. It also has a somewhat long ADS time of 269ms, however. Due to the weapon's aggressive damage falloff, this SMG will struggle on larger maps like Estate and Derail. The good news is that this build has controllable recoil, a massive magazine, and is incredibly easy to use.

Loadout Recommendations

Perks

Vest

CCT Comms Vest

Gloves

Marksman Gloves

Boots

Covert Sneakers

Gear

Ghost, Mag Holster

Equipment

Secondary

Preference

Field Upgrade

Med Box

Fighting up close with a suppressed weapon makes the CCT Comms Vest a strong option. This vest grants a second gear slot and the Data Jacker perk for free. You'll also have a larger minimap to better locate targets marked by your Data Jacker pings. Since our build has poor flinch resistance, the Marksman Gloves are a must for maintaining accuracy in mid-range duels.

Stealth perks are also ideal here, notably Covert Sneakers and Ghost for hiding your footstep audio and minimap icon, respectively. Use any equipment that suits your playstyle. For aggressive players, use the Med Box to reduce your healing delay before a gunfight starts.

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Strafe AMR9 Weapon Build

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AMR9 Build

Attachment

Pros And Cons

Nydar Model 2023

(Optic)

  • Precision Sight Picture
  • N/A

Tectonic Herald Light Barrel

(Barrel)

  • +Aim Walking Steadiness
  • +Aim Walking Speed
  • +Movement Speed
  • Hipfire and Tac Stance Spread

JAK BFB

(Muzzle)

  • +Gun Kick Control
  • +Vertical Recoil
  • +Horizontal Recoil
  • (Unlisted) Your Radar Pings Show Direction
  • Increased Radar Detection
  • -Aim Down Sights Speed
  • -Sprint to Fire Speed
  • -Aim Walking Speed

FTAC SP-10 Angled Grip

(Underbarrel)

  • +Horizontal Recoil
  • +Aiming Idle Sway
  • +Gun Kick Control
  • +Aim Walking Steadiness
  • -Vertical Recoil

Demo D50 Buffer Tube

(Stock)

  • +Sprint to Fire Speed
  • +AIm Down Sights Speed
  • +Aim Walking Speed
  • +Hipfire and Tac Stance Spread
  • -Gun Kick Control
  • -Aiming Idle Sway
  • -Recoil Control
  • -Flinch Resistance

MW3's first season introduced the JAK BFB muzzle to the sandbox, providing a whopping 60% visual recoil reduction, 40% less vertical recoil, and 20% less horizontal recoil. This muzzle is so powerful that it allows you to run the Demo D50 Buffer Tube—this gun's version of a 'No Stock' attachment—to massively buff your mobility and handling stats.

You'll still suffer from increased recoil with these two attachments, so you'll want to use the SP-10 Angled Grip to give this weapon some much-needed aiming stability. Throw on any optic to remove the AMR9's busy iron sights, then equip the Tectonic Herald Light Barrel to buff your strafe speed even further.

All five attachments turn this weapon into an excellent close-range SMG for aggressive playstyles. You'll strafe faster than most players, ready your SMG incredibly fast, and benefit from a solid reduction to your overall recoil. You will appear as an Advanced UAV icon whenever you shoot, so be careful. Avoid using this build in one-life modes.

Loadout Recommendations

Perks

Vest

Infantry Vest

Gloves

Scavenger Gloves

Boots

Covert Sneakers OR Tactical Pads

Gear

Mag Holster

Equipment

Secondary

Preference

Lethal

Throwing Knife

Tactical

Stim

Field Upgrade

Dead Silence

Since this build doesn't use a suppressor, it's best to spec for speed over stealth. We use the Infantry Vest to double our tactical sprint duration. Scavenger Gloves ensure you'll always have ammo, and Mag Holster makes reloading much faster on the AMR9. For your boots, you can either use Covert Sneakers to muffle your footsteps or Tactical Pads to slide further and remain in ADS mid-slide.

For equipment, the only important pick is Dead Silence. This will grant Covert Sneakers and Ghost for a short duration while active, extended by a few seconds with every kill. Use this before you push an objective or flank the enemy team for some easy kills. We also recommend Stims and Throwing Knives for general equipment.

JAK Ettin Build

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AMR9 Build

Attachment

Pros And Cons

JAK Ettin Double Barrel Kit

(Conversion Kit)

  • Double Barrel Action
  • (Unlisted) +7ms Delay Between Bursts
  • (Unlisted) Disables Barrel and Muzzle Attachments
  • -ADS Spread
  • -Hipfire and Tac Stance Spread
  • -Firing Aim Stability

Cronen Intals MSP-12

(Optic)

  • +Gun Kick Control
  • +Aiming Idle Sway
  • +Horizontal Recoil
  • +Firing Aim Stability
  • -Aim Down Sights Speed
  • -Vertical Recoil

Bruen Bastion Angled Grip

(Underbarrel)

  • +Magazine Capacity
  • -Aim Down Sights Speed
  • -Reload Quickness
  • -Aim Walking Speed
  • -Movement Speed

50 Round Mag

(Magazine)

  • +Magazine Capacity
  • -Aim Down Sights Speed
  • -Reload Quickness
  • -Aim Walking Speed
  • -Movement Speed

XTEN Grip

(Rear Grip)

  • +Tac Stance Spread
  • +Sprint to Fire Speed
  • -Gun Kick Control
  • -Recoil Control

The JAK Ettin attachment converts the AMR9 into a double-barreled SMG, making it fire two rounds simultaneously. This comes with a slight hit to your RPM and base damage, but the second barrel puts in work when you're in close-quarters combat. That's why this build focuses on tactical stance accuracy, as this weapon complements the Tac Stance mechanic quite well.

We equip the JAK Ettin Double Barrel Kit to modify how the gun behaves. Since it chews through ammo twice as fast, the 50 Round Mag is mandatory here. For Tac Stance accuracy, we use the Cronne Intlas MSP-12, Bruen Bastion Angled Grip, and the XTEN Grip. All of these attachments give you a Tac Stance spread of 1.7°, making this a highly accurate weapon up to roughly 20 meters.

If you're using the AMR9 in Zombies, consider dropping the XTEN Grip for the Demo D50 Buffer Tube. The increased recoil has little impact in MWZ.

Loadout Recommendations

Perks

Vest

Infantry Vest

Gloves

Scavenger Gloves

Boots

Covert Sneakers OR Tactical Pads

Gear

Mag Holster

Equipment

Secondary

Preference

Lethal

Throwing Knife

Tactical

Stim

Field Upgrade

Dead Silence

We'll be recommending the same build as our strafe configuration since this weapon should only be used in close quarters. Use the Infantry Vest to extend your tactical sprint duration, Scavenger Gloves to restock on ammo, and Mag Holster to reload faster. Boots and equipment are down to preference.

JAK Atlas Build

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AMR9 Build

Attachment

Pros And Cons

JAK Atlas Kit

(Conversion Kit)

  • +Vertical Recoil
  • +Bullet Velocity
  • +Gun Kick Control
  • +Damage Range
  • -Fire Rate
  • -Damage

T51R Billeted Brake S

(Muzzle)

  • +Vertical Recoil
  • +Firing Aim Stability
  • -Horizontal Recoil
  • -Bullet Velocity & Range

Bruen Pivot Vertical Grip

(Underbarrel)

  • +Gun Kick Control
  • +Vertical Recoil
  • +Aiming Idle Sway
  • +Firing Aim Stability
  • -Horizontal Recoil
  • -Aim Down Sights Speed
  • -Sprint to Fire Speed

Sakin ZX Grip

(Rear Grip)

  • +Firing Aim Stability
  • +Gun Kick Control
  • +Recoil Control
  • -Aiming Idle Sway

OORT-6 Precision Stock

(Stock)

  • +Aiming Idle Sway
  • +Firing Aim Stability
  • -Movement Speed
  • -Aim Walking Speed

The JAK Atlas Kit converts the AMR9 into a five-round burst rifle, featuring slightly better range and recoil than the standard AMR9. This weapon can one-burst targets up to roughly 15 meters, so you'll want a weapon that mitigates as much recoil as possible without hurting your handling stats. To do this, we suggest an accuracy build.

We use the T51R Billeted Brake S and the Bruen Pivot Vertical Grip to substantially lower our vertical recoil. The Sakin ZX Grip then lowers the weapon's vertical recoil. This attachment hurts our aiming stability, so we equip the OORT-6 Precision Stock to recover some of our lost aiming stability, plus gain some firing aim stability on the side. The end result is a burst rifle that has virtually no recoil and can easily one-burst targets at close range.

Loadout Recommendations

Perks

Vest

Infantry Vest

Gloves

Commando Gloves

Boots

Covert Sneakers OR All-Terrain Boots

Gear

Mag Holster

Equipment

Secondary

Preference

Lethal

Throwing Knife

Tactical

Stim

Field Upgrade

Dead Silence

We recommend the same perks as our previous builds. The Infantry Vest is ideal for aggressive playstyles, giving you Running Sneakers for free. We then use Covert Sneakers to muffle our footsteps, although you can use All-Terrain Boots instead. Mag Holster lowers your reload speed, and the Commando Gloves perk greatly reduces your sprint-to-fire delay.

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