Call of Duty: Modern Warfare 2 reimagines the Gunsmith system so you can adapt your weapon to your personal playstyle. At level 4, you’ll gain access to the classic M4 weapon. This automatic assault rifle features numerous attachments. However, we don’t know all of them, thanks to some that hold the “Classified” label. So, let’s look at all the known M4 attachments in the Modern Warfare 2 beta so you know what you can work with now.

All Confirmed M4 Attachments in the Modern Warfare 2 Beta

The Modern Warfare 2 Open Beta only allows you some attachments as all of them unlock during the full game on October 28. There is still enough that you can play around with right now to customize the M4 to work best with your playstyle needs.

For the M4 in Modern Warfare 2 beta, there are 10 attachments: Muzzle, Barrel, Underbarrel, Laser, Optic, Stock, Rear Grip, Receiver, Magazine, and Ammunition.

Muzzle M4 Attachments:

  • Bruen Spearhead Suppressor
  • Echoline GS-X Suppressor
  • Komodo Heavy Comp
  • Forge-Tac Castle Comp
  • C400 Door Knocker

Barrel M4 Attachments in Modern Warfare 2:

  • 14″ Carbine Shroud Barrel
  • 7.5″ Tempus Firebrand Barrel
  • Tempus Trench Pro
  • 419MM EXF Barrel
  • Tempus Hightower 20″ Barrel
  • 11.5″ T-H4 Barrel
  • LX-97 Torque Barrel

Underbarrel M4 Attachments:

  • FSS Sharkfin 90
  • VX Pineapple Vert Grip
  • SPW 40MM
  • Forge-Tac Ripper 56
  • Lockgrip Precision-40

Laser M4 Attachments:

  • 4MW Laser Box
  • Corvus PEQ Beam-5

Optic M4 Attachments:

  • Cronen Mini Red Dot
  • SZ Reflex
  • SZ Lonewolf Optic
  • Forge-Tac Delta 4
  • Thermo-Optic X9
  • DS Warme Zielfernrohr
  • SZ Mini
  • Schlager 4X
  • Hybrid Firepoint
  • HMW-20

Stock M4 Attachments in Modern Warfare 2:

  • No Stock
  • Ordnance Ravage-8
  • Demo Fade Pro Stock
  • Tempus P80 Strike Stock
  • Demo Precision Elite Factory
  • Corio Precio Factory

Rear Grip M4 Attachments:

  • D15 Grip
  • Sakin ZX Grip
  • Xten Grip
  • Phantom Grip
  • Support CP90 Grip

Receiver M4 Attachments:

This is closer to a weapon conversion as it adjusts the stats and how the weapon functions.

  • M16
  • 556 Icarus
  • FTAC Recon
  • FSS Hurricane

Magazine M4 Attachments in Modern Warfare 2:

  • 45-Round Mag
  • 60-Round Mag

Ammunition M4 Attachments:

  • 5.56 Frangible
  • 5.56 Armor Piercing

Modern Warfare 2: What is the Max Level Cap in the Beta

Call of Duty: Modern Warfare 2 will be available on October 28 for Xbox One and Series consoles, PS5 and PS4 consoles, and PC. The Open Beta is currently available for PS pre-order players. Open Beta’s second week begins on September 22 for other players.