In Warzone 2 and Modern Warfare 2 (CODMW2 2022), players can use and unlock the M13B (Assault Rifle). Get to know the builds for this weapon, attachments, stats, and more using this guide.
Note that this guide is a work in progress and will be updated in the coming days as more info is acquired.
The M13B features a short-stroke piston system that allows for a high rate of fire and low recoil.
By default, the M13B carries the following rounds when you spawn:
The M13B can be unlocked by Unlock by defeating the chemist in the radiation zone of DMZ and extracting his dropped weapon.
This part is currently being updated. Please stay tuned!
| Header | Pros | Cons |
| Slimline Pro | + Precision Sight Picture | – Aim Down Sight Speed |
| SZ Mini | + Precision Sight Picture | – Aim Down Sight Speed |
| Cronen Mini Red Dot | + Precision Sight Picture | – Aim Down Sight Speed |
| Cronen Mini Pro | + Precision Sight Picture | – Aim Down Sight Speed |
| SZ Sigma-IV Optic | + Precision Sight Picture | – Aim Down Sight Speed |
| SZ Minitac-40 | + Precision Sight Picture | – Aim Down Sight Speed |
| XRK On-Point Optic | + Precision Sight Picture | – Aim Down Sight Speed |
| Aim OP-V4 | + Precision Sight Picture | – Aim Down Sight Speed |
| DF105 Reflex Sight | + Precision Sight Picture | – Aim Down Sight Speed |
| Monocle CT90 | + Precision Sight Picture | – Aim Down Sight Speed |
| Corvus SOL-76 | + Precision Sight Picture | – Aim Down Sight Speed |
| SZ Recharge-DX | + Precision Sight Picture | – Aim Down Sight Speed |
| SZ SRO-7 | + Precision Sight Picture | – Aim Down Sight Speed |
| Corio RE-X Pro | + Precision Sight Picture | – Aim Down Sight Speed |
| Corio Enforcer Optic | + Precision Sight Picture | – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Lonewolf Optic | + Precision Sight Picture | – Aim Down Sight Speed – Aim Walking Movement Speed |
| Kazan-Holo | + Precision Sight Picture | – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Battle Optic | + Precision Sight Picture | – Aim Down Sight Speed – Aim Walking Movement Speed |
| Corvus Downrange-00 | + Precision Sight Picture | – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Holotherm | + Precision Sight Picture + Thermal Target Identification | – Aim Down Sight Speed – Aim Walking Movement Speed |
| XTEN Angel-40 | + Precision Sight Picture + Target Range Indicator | – Aim Down Sight Speed – Aim Walking Movement Speed |
| VLK 4.0 Optic | + 4.0x Magnification | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Schlager 3.4x | + 3.4x Magnification | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Forge TAC Delta 4 | + 5.5x Magnification | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Cronen Zero-P Optic | + 5.0x Magnification | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Bullseye Optic | + 6.0x Magnification | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Aggressor-IR Optic | + 6.3x Magnification + Thermal Target Identification | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Schlager Night View | + 6.0x Magnification + Thermal Target Identification | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| VX350 Thermal Optic | + 5.5x Magnification + Thermal Target Identification | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Teplo-OP3 Scope | + 5.0x Magnification + Thermal Target Identification | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| DR582 Hybrid Sight | + 4.8x Magnification + Dual Optics Toggle | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Hybrid Firepoint | + 4.3x Magnification + Dual Optics Toggle | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Vortex-90 | + 5.0x Magnification + Dual Optics Toggle | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| BPZ40 Hybrid | + 5.5x Magnification + Dual Optics Toggle | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| SZ Oscar-9 | + 4.8x Magnification + Dual Optics Toggle | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Angel-40 4.8x | + 4.8x Magnification + Target Range Indicator + Dual Optics Toggle | – Very Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Thermo-Optic X9 | + 5.5x Magnification + Thermal Target Identification + Dual Optics Toggle | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Teplo Clear Shot | + 5.0x Magnification + Thermal Target Identification + Dual Optics Toggle | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| FTAC Charlie7 | + 7.5x Magnification | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| HMW-20 Optic | + 8.0x Magnification | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Luca Bandera Scope | + 3.7x Magnification + 8.0x Magnification Toggle | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| DS Farsight 11 | + 4.0x Magnification + 8.0x Magnification Toggle | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| 3x RFL-Optic | + 3.0x Magnification + Infrared Night Vision + 8.0x Magnification Toggle | – Small Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| Drexsom Prime-90 | + 7.5x Magnification + Thermal Target Identification | – Medium Sniper Glint – Aim Down Sight Speed – Aim Walking Movement Speed |
| 1mW Artemis Laser | + Aiming Stability | |
| 1mW Quick Fire Laser | + Aim Down Sight Speed | |
| Accu-shot 5mW Laser | + Aim Down Sight Speed ‘+ Aiming Stability | – Laser Visible ADS |
| VLK LZR 7mW | + Aim Down Sight Speed + Aiming Stability + Sprint to Fire Speed | – Laser Visible ADS |
| 7mW Canted Laser | + Canted Laser Aiming + Aiming Stability + Aim Down Sight Speed + Sprint to Fire Speed | – Laser Visible to Enemies – Recoil Stabilization |
| Schlager ULO-66 Laser | + Hip Fire Accuracy + Hip Recoil Control | |
| STOVL Tac Laser | + Hip Recoil Control + Hip Fire Accuracy | |
| Hipshot L20 | + Hip Recoil Control + Hip Fire Accuracy | – Laser Visible at hip |
| Point-G3P 04 | + Hip Recoil Control + Hip Fire Accuracy + Sprint to Fire Speed | – Laser Visible at hip |
| FJX Ultrabeam XR | + Flashlight + Sprint to Fire Speed + Aim Walking Steadiness | – Flashlight Visible in ADS |
| EXF Solarflare | + Flashlight + Sprint to Fire Speed + Aim Stability | – Flashlight Visible in ADS |
| Header | Pros | Cons |
| 14′ Bruen Echelon | + Damage Range + Bullet Velocity + Hip Fire Accuracy + Recoil Control | – Aim Down Sight Speed – Hip Recoil Control – Movement Speed |
| 7′ Bruen B-M20 | + Aim Down Sight Speed + Hip Recoil Control + Movement Speed | – Damage Range – Bullet Velocity – Hip Fire Accuracy – Recoil Control |
| Header | Pros | Cons |
| Commando Foregrip | + Aiming Idle Stability + Recoil Stabilization | – Aim Down Sight Speed |
| Edge-47 Grip | + Aiming Idle Stability + Recoil Stabilization | – Aim Down Sight Speed |
| Demo Firm Grip | + Aiming Idle Stability + Hip Fire Accuracy + Recoil Stabilization | – Aim Down Sight Speed – Walking Speed |
| XTEN Gravedigger | + Aiming Idle Stability + Hip Fire Accuracy + Recoil Stabilization | – Aim Down Sight Speed – Walking Speed |
| FTAC Ripper 56 | + Aiming Idle Stability + Hip Fire Accuracy + Recoil Stabilization | – Aim Down Sight Speed – Walking Speed |
| Demo Cleanshot 40 | + Aiming Idle Stability + Hip Fire Accuracy + Recoil Stabilization | – Aim Down Sight Speed – Movement Speed |
| Demo IMP-44 Grip | + Aiming Idle Stability + Hip Fire Accuracy + Recoil Stabilization | – Aim Down Sight Speed – Walking Speed |
| FTAC Tiger Grip | + Aiming Idle Stability + Hip Fire Accuracy + Recoil Stabilitzation | – Walking Speed – Aim Down Sight Speed |
| FSS Sharkfin 90 | + Aiming Idle Stability | |
| Agent Grip | + Aiming Idle Stability + Hip Fire Accuracy | – Walking Speed |
| Bruen Sync Shot Grip | + Aiming Idle Stability + Hip Fire Accuracy | – Walking Speed |
| XTEN Drop Grip | + Aiming Idle Stability + Hip Fire Accuracy | – Walking Speed |
| XTEN Nexus Grip | + Aiming Idle Stability + Recoil Stabilization | – Aim Down Sight Speed |
| Phase-3 Grip | + Aiming idle Stability + Hip Fire Accuracy + Recoil Stabilitzation | – Walking Speed – Aim Down Sight Speed |
| Merc Foregrip | + Hip Fire Accuracy + Recoil Steadiness + Hip Recoil Control + Aim Walking Steadiness | – Hip Walking Speed – Aim Down Sight Speed |
| Lockgrip Precision-40 | + Hip Fire Accuracy + Recoil Steadiness +Aim Walking Steadiness | – Aim Down Sight Speed |
| Hex-40 Grip | + Hip Fire Accuracy + Recoil Steadiness + Aim Walking Steadiness + Hip Recoil Control | – Aim Down Sight Speed – Hip Walking Speed |
| Schlager Tango | + Hip Fire Accuracy + Aim Walking Steadiness + Recoil Steadiness | – Aim Down Sight Speed |
| VX Pineapple | + Hip Fire Accuracy + Hip Recoil Control + Recoil Steadiness + Aim Walking Steadiness | – Hip Walking Speed – Aim Down Sight Speed |
| OP-X9 Foregrip | + Hip Fire Accuracy + Aim Walking Steadiness + Recoil Steadiness + Hip Recoil Control | – Hip Walking Speed – Aim Down Sight Speed |
| Operator Foregrip | + Hip Fire Accuracy + Aim Walking Steadiness + Hip Recoil Control | – Hip Walking Speed |
| TV Wrecker Grip | + Hip Fire Accuracy + Aim Walking Steadiness | |
| Bruen Tilt Grip | + Hip Fire Accuracy + Hip Recoil Control + Aim Walking Steadiness | – Hip Walking Speed |
| Cronen Grooveshot Grip | + Hip Fire Accuracy + Hip Recoil Control + Aim Walking Steadiness | – Hip Walking Speed |
| EXF Backdraft Grip | + Hip Fire Accuracy + Hip Recoil Control + Aim Walking Steadiness + Recoil Steadiness | – Hip Walking Speed – Aim Down Sight Speed |
| Bruen Warrior Grip | + Hip Fire Accuracy + Hip Recoil Control + Aim Walking Steadiness + Recoil Steadiness | – Hip Walking Speed – Aim Down Sight Speed |
| Bipod V9 Grip | + Bipod Mount + Recoil Steadiness | – Aim Down Sight Speed. |
| Level Aim Bipod | + Bipod Mount | – Aim Down Sight Speed |
| Cornerstone Bipod | + Bipod Mount | – Aim Walking Movement Speed |
| XTEN Stable Shot | + Bipod Mount | – Sprint Speed |
| SPW 40mm | + Underbarrel Grenade Launcher | – Aim Down Sight Speed – Movement Speed |
| Corvus Masterkey | + Underbarrel Shotgun | – Aim Down Sight Speed |
| Header | Pros | Cons |
| Cronen MAW-86 | + Muzzle Flash Concealment + Recoil Stabilization + Recoil Steadiness | – Aim Down Sight Speed – Aiming Stability |
| Dark KX30 | + Muzzle Flash Concealment + Recoil Steadiness | – Aim Down Sight Speed – Aiming Stability |
| VLK Koloss Flash Hider | + Muzzle Flash Concealment + Recoil Steadiness + Recoil Stabilization | – Aim Down Sight Speed – Aiming Stability |
| Broadhead-3DP | + Sound Suppression + Recoil Smoothness + Recoil Control | – Aim Down Sight Speed – Damage Range – Aim Walking Speed – Aiming Stability |
| Silentfire XG6 | + Sound Suppression + Bullet Velocity + Recoil Smoothness + Recoil Control | – Aim Down Sight Speed – Aim Walking Speed – Aiming Stability |
| Echoline GS-X | + Sound Suppression + Recoil Smoothness | – Damage Range |
| Zulu-60 | + Sound Suppression + Bullet Velocity + Recoil Smoothness + Recoil Control | – Aim Down Sight Speed – Aiming Stability – Aim Walking Speed – Damage Range |
| Harbinger D20 | + Sound Suppression + Bullet Velocity + Damage Range + Recoil Smoothness | – Aim Down Sight Speed – Aiming Stability – Aim Walking Speed |
| Echoless-80 | + Sound Suppression + Bullet Velocity + Damage Range + Recoil Smoothness | – Aim Down Sight Speed – Aiming Stability |
| FSS Covert V | + Sound Suppression + Bullet Velocity + Recoil Smoothness | – Aim Down Sight Speed – Aiming Stability |
| Gauge-9 Mono | + Sound Suppression + Bullet Velocity + Recoil Smoothness + Recoil Control | – Aim Down Sight Speed – Aiming Stability – Aim Walking Speed – Damage Range |
| RF Crown 50 | + Horizontal Recoil Control + Vertical Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| Komodo Heavy | + Horizontal Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| XTen Ported 290 | + Vertical Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| FJX Fulcrum Pro | + Vertical Recoil Control + Horizontal Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| Cronen OP44 | + Vertical Recoil Control + Horizontal Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| FTAC Castle Comp | + Horizontal Recoil Control + Vertical Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| Xten Havoc 90 | + Horizontal Recoil Control + Vertical Recoil Control | – Aim Down Sight Speed – Aiming Stability |
| Header | Pros | Cons |
| 5.56 Frangible | + Inflict Wounding Effect | – Bullet Penetration – Damage Range |
| 5.56 Hollowpoint | + Crippling Power | – Bullet Velocity – Bullet Penetration |
| 5.56 Armor Piercing | + Bullet Penetration + Vehicle Damage | – Bullet Velocity |
| 5.56 Overpressured +P | + Target Flinch | – Recoil Control |
| 5.56 High Velocity | + Bullet Velocity | – Damage Range |
| Header | Pros | Cons |
| 45 Round Mag (5.56) | + Magazine Ammo Capacity | – Movement Speed – Aim Down Sight Speed – Reload Quickness – Sprint to Fire Speed |
| 60 Round Mag (5.56) | + Magazine Ammo Capacity | – Movement Speed – Aim Down Sight Speed – Reload Quickness – Sprint to Fire Speed |
| Header | Pros | Cons |
| Bruen GR-500 | + Flinch Resistance | – Aim Walking Movement Speed |
| D37 Grip | + Recoil Control | – Aiming Stability |
| Bruen Flash Grip | + Sprint to Fire Speed + Aim Down Sight Speed | – Recoil Control |
| Header | Pros | Cons |
| Ravage-8 | + Crouch Movement Speed + Sprint Speed + Aim Down Sight Speed | – Recoil Control |
| Bruen R90 Factory | + Aim Walking Speed + Sprint Speed + Recoil Control | – Aiming Stability – Aim Down Sight Speed – Crouch Movement Speed |
| Bruen Flash V4 Stock | + Sprint Speed + Aim Walking Speed + Crouch Movement Speed + Aim Down Sight Speed | – Aiming Stability – Recoil Control |
Level up the M13B to unlock the following attachments, weapons, and features:
| Level 1 | – | Level 11 | FJX Fulcrum Pro |
| Level 2 | Muzzle Category | Level 12 | DS Farsight 11 |
| Level 3 | Optic Category | Level 13 | Underbarrel Category |
| Level 4 | 7′ Bruen B-M20 | Level 14 | 5.56 Hollowpoint |
| Level 5 | Stock Category | Level 15 | JCZ-390 Muzzle Device |
| Level 6 | Cronen MAW-86 | Level 16 | Edge-47 Grip |
| Level 7 | Laser Category | Level 17 | 14′ Bruen Echelon |
| Level 8 | 45 Round Mag (5.56) | Level 18 | 60 Round Mag (5.56) |
| Level 9 | Ammo Category | Level 19 | Zulu-60 |
| Level 10 | Rear Grip Category | Level 20 | Weapon Tuning |
| Weapon Lists | ||
|---|---|---|
| Assault Rifles | Battle Rifles | SMGs |
| Shotguns | LMGs | Marksman Rifles |
| Sniper Rifles | Handguns | Launchers |
| Melee Weapons | – | – |
| Equipment Lists | ||
| Tacticals | Lethals | Field Upgrades |
