COD Modern Warfare 2: How To Unlock Attachments

Learn everything you need to know about the new attachment unlocking mechanism in COD Modern Warfare 2.

The attachment-unlocking mechanism of the Modern Warfare 2 is completely changed compared to the previous one in Modern Warfare. The developers have added some major changes to the Gunsmith system. There is a lot of confusion regarding the new features added to the game. COD Modern Warfare 2: How to unlock attachments will explain everything about the unlocking mechanism of the best guns and all the latest changes to the Gunsmith system.

Story Highlights

  • You can’t unlock all the attachments by leveling up a single weapon receiver.
  • Unlock all the attachments by leveling up all the receivers of the weapon platform.
  • There are multiple Receivers in a single platform.
  • There are two types of Weapon Attachments in Modern Warfare 2.

How To Unlock Attachments In MW 2

FSS HURRICANE Receiver [Image Credit: eXputer]
You will need to level up the weapons in order to unlock the new attachments in Modern Warfare 2. The question is, will you unlock all the attachments once you level up to the maximum for a certain weapon? For example, you have an M4 at the start of the game. M4 has a total of 20 levels; once you level it up to 20, will you get all the attachments? The answer is NO.

You’ll need to go through every single receiver on the platform to unlock all the attachments for a certain weapon platform. Level up all the receivers, and unlock all the attachments for every single receiver. Once done with that, you will have all the attachments for your platform to use at your disposal.

The good news is that once a certain weapon is modified in a certain platform, the changes aren’t lost with changing the receiver. Suppose you have the Receiver for the assault rifle, but if there is a receiver for the SMG within the same platform and you switch to that receiver, then you have the SMG in place. However, the modifications you have previously done on that assault rifle will move over to that SMG.

To understand more, you will need to find out how the weapon platforms work. Follow the guide below to learn more about the weapon attachments unlocking mechanism.

Weapon Platforms

Platform M4
M4 Platform Receivers [Image Credit: eXputer]
The weapon’s progression system is completely altered, and some new features are added to the Gunsmith system. A new idea of a Weapon Platform system is introduced. The concept is a completely unique way of enhancing weapon abilities to a whole new class. 

A weapon platform in modern warfare 2 is a family of Weapons that share the same attachments. There are multiple Receivers in a single platform; change the receiver, and you get a whole new weapon. Each of the Receivers has its own unique progression.

You won’t be able to unlock all the attachments just by griding a single Receiver of the family. However, each of the shared attachments that you unlocked for one Receiver is now cross-progressive and attachable to all the other members of the same weapon class.

For example, the M4 platform consists of the following receivers

If you have changed the receiver from M4 to M16, it is a completely new weapon with its own attachments. Now, these attachments can be unlocked by leveling up the M16 Receiver, not the M4 Receiver. Then they can be shared by all the other Receivers in the family.

Accordingly, if you want to unlock a certain attachment in a certain Receiver, click on the attachment. It will show you the exact level on which it will be unlocked. For example, if you want to unlock the FTAC RECON Laser, click on it. You can see it showing up UNLOCKED BY LEVELING FTAC RECON TO LEVEL 14. 

How to unlock FTAC RECON Laser [Image Credit: eXputer]
So this is how the system works. Here we have only discussed the M4 platform, but all the other platforms work in the exact same manner. 

Types Of Attachments In Modern Warfare 2

FTAC RECON Attachment
FTAC RECON Attachments [Image Credit: Infinity Ward]
Infinity Ward has also categorized the attachments in the new edition of the game. The attachments can now be shared within the weapon platform as well as between various platforms. We have two types of attachments in COD Modern Warfare 2, Platform Specific Attachments and Universal Attachments.

Platform Specific Attachments

As suggested by the name, the platform-specific attachments are those which can only be shared within the same weapon platform. Once unlocked in one receiver of the Platform, you can use it in all the other receivers. Some of the Platform specific weapon attachments are

  • Magazine
  • Rear Grip
  • Stock
  • Barrel

Suppose you have unlocked them within the M4 platform; you can’t use them in any other weapon family. You can only use it with M16, 556 ICARUS, FTAC RECON, and FSS HURRICANE receivers of the same M4 family.

Universal Attachments

The universal attachments do not have any restrictions imposed. They can be used with every weapon within Modern Warfare 2, whether within the platform or between the platforms. Some universal attachments are

  • Underbarrel
  • Laser
  • Muzzle
  • Optic
  • Ammunition

Level up through the M4 and unlock any of the attachments above; you will be able to use it with any other weapon across the game. 

Best Attachments In The M4 Platform And How To Unlock Them

There are many attachments to unlock in the M4 family of Modern Warfare 2. These can be unlocked by leveling up through the M4 receivers. We can’t discuss all, but we’ll discuss some of the best attachments in the M4 Platform.

  • Stock: Corio Precio Factory is one of the best M4 attachments, and it can be unlocked by leveling the M4 Receiver of the family up to level 7.
  • Barrel: Tempus Hightower 20 is also one of the favorites in the barrels out there in the game. You can unlock it by grinding the M4 receiver up to the 15th level.
  • Rear Grip: Phantom grip is also the one that should be on your priority list. It can be unlocked in M4 Receiver by leveling up to level 12.
Phantom Grip M4
Phantom Grip in M4 [Image Credit: eXputer]
  • Muzzle: Forge Tac Castle Comp is the best muzzle in M4 to unlock. Level up the 556 ICARUS to level 10 to unlock this attachment.


The Gunsmith system in Call Of Duty Modern Warfare 2 is a unique way of giving players the control to customize their weapons in a more easily manageable environment. In Modern Warfare 2, the Gunsmith system previously used has got some major changes by Infinity Ward, the developers of the game. 

The attachment unlocking system of COD Modern Warfare 2 comes at the cost of a lot of grind. You have to go through the hassle of grinding up different weapons to unlock them. However, it also gives you more control and with different receivers in a single platform also gives more options to add to the weapon abilities. You can level up the receivers by collecting weapon XP tokens, completing the campaign, and collecting kills.

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Irfan Ansari

With four years of Video Game Journalism and Tremendous love for Gaming, Irfan loves chatting and writing everything about video games.

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