Modern Warfare 3 M4 Loadout MW3 - Modern Warfare 3

This is the best class build for the M4, a type of Assault Rifle in Call of Duty: Modern Warfare 3 (MW3). Check here to learn how to play the best loadout for the M4, including the best attachments and recommended Perk Package.

The flagship rifle of the M4 Platform. This reliable workhorse is a jack-of-all-trades that performs well in most combat scenarios.
Basic Info
Platform: M4
Weapon Class: Assault Rifle
Max Level: 20
Magazine Capacity: 30
Reserve Ammo: 60
Fire Modes: Full-Auto/Semi-Auto
How to Unlock Unlocked by default.

Modern Warfare 3 M4

MW3 Weapons: Zombies Camos (MWZ)

MWII Weapons: MWZ Individual Camos: Every MWII has up to four individual Zombie Camos, all brand-new to MWIII, and each requiring unlock challenges to obtain.

Specific Weapon Example: Let’s return to the M4 from MWII (as shown above).

  • Specific Zombie Camos: As well as the four specific MP Camos (that can be unlocked in either game), there are four additional M4 Zombie Camo Unlocks (Rancid Venom, Dark Mist, Nightmare, and Fertilizer).
  • Specific Zombie Camos Unlock Criteria: For each of the four Zombie Camos specific to the M4, you need to complete a level challenge (e.g., “get the M4 to Level 19”, which you’re likely to have already completed if you leveled up the weapon previously), as well as a Zombies-specific challenge (e.g., “In Zombies, get 5 Mimic kills with the M4”).
  • Completionist Zombies Camos for MWII Weapons: There are four brand-new Completionist Camos as well (Golden Ivory, Spinel Husk, Arachnida, Bioluminescent). The unlock criteria for these is the same across all MWII weaponry, and is detailed below.
  • Weapon Mastery: The Golden Ivory, Spinel Husk, Arachnida, and Bioluminescent Mastery also have Weapon Mastery challenges, allowing you to claim Emblems and Calling Cards for each, as well as the Completionist Charm.

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Weapon Stats

Modern Warfare 3 M4 Weapon Stats

Best M4 Class Build

Weapon Loadout
Primary M4
Secondary X13 Auto
Tactical Stun Grenade
Lethal Semtex
Base Perk 1 Double Time
Base Perk 2 Scavenger
Bonus Perk Fast Hands
Ultimate Perk Quick Fix
Field Upgrade Dead Silence

Best M4 Attachment Loadout

Barrel Tempus Trench Pro
Muzzle SAKIN Tread-40
Laser 1MW Laser Box
Underbarrel FSS Sharkfin 90
Rear Grip Sakin ZX Grip

How to Play

This M4 loadout minimizes recoil and maximizes ADS speed without making any considerable reductions in damage output. The reload speed of the M4 will be made quicker through the Fast Hands bonus perk. Players can also go behind enemy lines faster through the Double Time perk coupled with the Dead Silence field upgrade.

To maximize the full potential of this loadout, it is recommended for players to use an aggressive, run-and-gun playstyle with the intention of pushing enemy spawns without being detected.

Progression Tree: All Unlockables

All Unlockables
SZ Lonewolf Optic
Optic
(Level 2)
Echoline GS-X
Muzzle
(Level 3)
11.5” T-H4 Barrel
Barrel
(Level 4)
45 Round Mag
Magazine
(Level 5)
FSS Sharkfin 90
Underbarrel
(Level 6)
Stock
Category Unlock
(Level 7)
Corio Precio Factory
Stock
(Level 7)
Rear Grip
Category Unlock
(Level 8)
Sakin ZX Grip
Rear Grip
(Level 8)
Ammunition
Category Unlock
(Level 9)
5.56 Armor Piercing
Ammunition
(Level 9)
Tempus Trench Pro
Barrel
(Level 10)
Tempus P80 Strike Stock
Stock
(Level 11)
Laser
Category Unlock
(Level 12)
1MW Laser Box
Laser
(Level 12)
FTAC Recon
Receiver
(Level 13)
Demo D50 Buffer Tube
Stock
(Level 14)
Hightower 20” Barrel
Barrel
(Level 15)
XTEN Grip
Rear Grip
(Level 16)
556 Icarus
Receiver
(Level 18)
Demo Fade Pro Stock
Stock
(Level 19)
Weapon Tuning
Feature Unlock
(Level 20)

NOTE: Newly acquired weapons will have locked attachment slots at Level 1. Category Unlocks are upgrades that unlock these attachment slots for use.

Guns Unlocked by Leveling the M4

All Gun Unlocks
556 Icarus


Unlocked by leveling the M4 to Level 18.

FTAC Recon


Unlocked by leveling the M4 to Level 13.

All Compatible M4 Attachments

M4 Barrels

Tempus Trench Pro 419MM EXF Barrel Hightower 20” Barrel
11.5” T-H4 Barrel 11.5” Carbine Shroud 14” Carbine Shroud
7.5” Tempus Firebrand

M4 Magazines

45 Round Mag 60 Round Mag

M4 Stocks

Ravage-8 Tempus P80 Strike Stock Corio Precio Factory
Demo D50 Buffer Tube Demo Fade Pro Stock Demo Precision Elite Factory

M4 Rear Grips

Sakin ZX Grip D15 Grip XTEN Grip
Phantom Grip Support CP90 Grip

M4 Muzzles

Echoline GS-X Corvus Slash Gen. 2 Dark KX30
VLK Koloss Flash Hider Broadhead-3DP Silentfire XG6
Harbinger D20 Echoless-80 FSS Covert V
Gauge-9 Mono RF Crown 50 Komodo Heavy
XTen Ported 290 Cronen OP44 FTac Castle Comp
XTen Havoc 90 SAKIN Tread-40 C400 Door Knocker

M4 Underbarrels

Phase-3 Grip Merc Foregrip Lockgrip Precision-40
Hex-40 Grip Schlager Tango VX Pineapple
OP-X9 Foregrip TV Wrecker Grip Bruen Tilt Grip
Cronen Grooveshot Grip Bruen Warrior Grip Bipod V9 Grip
Level Aim Bipod Cornerstone Bipod XTen Stable Shot
SPW 40mm Corvus Masterkey FSS Sharkfin 90
Operator Foregrip Edge-47 Grip Demo Firm Grip
XTEN Gravedigger FTac Ripper 56 Demo Cleanshot 40
Demo Imp-44 Grip FTac Tiger Grip Agent Grip
Bruen Sync Shot Grip XTEN Drop Grip

M4 Ammunition

5.56 Armor Piercing 5.56 Overpressured +P 5.56 Frangible
5.56 High Velocity

M4 Lasers

Corio LAZ-44 V3 1MW Laser Box Luminate-44
SZ 1MW PEQ Schlager PEQ Box IV FSS OLE-V Laser
Canted Vibro-Dot 7 STOVL DR Laser Box Corvus PEQ Beam-5
FTac Grimline Laser DXS Flash 90

M4 Optics

SZ Mini Corvus SOL-76 Corio RE-X Pro
SZ Lonewolf Optic DR582 Hybrid Sight Slimline Pro
Cronen Mini Red Dot Cronen Mini Pro SZ Sigma-IV Optic
SZ Minitac-40 XRK On-Point Optic DF105 Reflex Sight
Monocle CT90 SZ Recharge-DX SZ SRO-7
Corio Enforcer Optic Kazan-Holo Corvus Downrange-00
SZ Holotherm XTEN Angel-40 VLK 4.0 Optic
Schlager 4X Forge Tac Delta 4 Cronen Zero-P Optic
SZ Bullseye Optic SZ Aggressor-IR Optic Schlager Night View
VX350 Thermal Optic Teplo-OP3 Scope Hybrid Firepoint
SZ Vortex-90 BPZ40 Hybrid Angel-40 4.8x
Thermo-Optic X9 Teplo Clear Shot FTac Charlie7
HMW-20 Optic Luca Bandera Scope Drexsom Prime-90
ARES Clear Shot

All M4 Camos

Camo Challenge Lv. Unlock
Scales Get 50 kills with the M4 2
Desert Hybrid Get 50 kills while ADS with the M4 8
Dark Leaves Get 10 double kills with the M4 13
Urban Renewal Get 15 kills from behind with the M4 19
Gold M4 Get 3 kills without dying 10 times with the M4 N/A

All M4 Blueprints

Blueprint How to Get
Union Guard Completing the Campaign
Dragonfly Pre-order the Playstation-exclusive Oni Operator Bundle
Secret Weapon Purchase the Overgrown Bundle
Mortal’s Bane Unlock the Victory Sector of the Season 1 Battle Pass
Short Fuse Purchase the Executive Warfighter Bundle
Flatline Purchase the Infinite Warfighters: ETH.3N Bundle
Pulling G’s Purchase the After Burner Bundle to Unlock

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