Customizing weapons has seen a big shakeup in Call of Duty: Modern Warfare 2. Unlocking attachments for the M4 platform (and all of the others) through CoD MW2’s multiplayer progress is not linear. It’s bewildering, and can often feel like you’re looking for a needle in a haystack.
This has led to a resounding cry of where’s my god-damned [insert preferred thing here] on the internet, and not unreasonably so. If you’re looking for how to unlock the red dot sight in particular, you’re in the right place here; it’s an FSS Hurricane unlock, and detailed below.
What a tangled web it all is. Luckily, we’ve got you covered, so let’s get into types of attachments, how to equip them, and all the attachments you’ll earn for levelling the M4 weapon platform.
CoD MW2: How to Unlock All Attachments in the M4 Weapon Platform
Unlike previous games, in which you unlocked weapons by ranking up, and then attachments by levelling up your weapons, this time the kit you need to tweak your guns is acquired by levelling up loads of different weapons. Attachments come in two forms this time too:
Universal attachments – these can be used across every compatible weapon in the game:
- Muzzle
- Underbarrel
- Ammunition
- Laser
- Optic
Some are more universal than others though – where you can equip your optic of choice onto pretty much anything, ammunition will only be compatible with similar weapon types. They are designated as universal as these similarities don’t always sit within the same platform.
For example, the 5.56 Armor Piercing ammo that unlocks when you get the M4 to level 9 can also be used on the M16, but not the other weapons on the M4 platform. It is, however, also equippable on the Lachmann 556 and STB 556, which are on the Lachmann and Bruen Bullpup platforms respectively, thus making it “universal.”
Weapons platform-specific attachments – these are compatible with receivers within the same platform:
- Barrel
- Magazine
- Stock
- Rear Grip
Again, there are restrictions here. Just because two weapons sit in the same platform doesn’t mean that they will necessarily share all of these types of attachments.
An example of this is the 14” Carbine Shroud barrel, which you’ll get at M16 level 2, and can only be equipped on the M16 and the M4. And as there is only one SMG on this platform in the form of the FSS Hurricane, any of these types of attachments you unlock won’t be shared across SMGs on other platforms.
It’s also not enough just to have unlocked attachments though – you’ve also gotta level up the weapons themselves to be able to equip them. You can see what level each attachment category is unlocked via the gunsmith menu, and once these requirements are met, you’ll have access to everything you’ve unlocked so far in that category that is compatible with that weapon.
It can be confusing, but this list of all M4 weapon platform attachments help you find what you’re looking for.
Call of Duty Modern Warfare 2: M4 Attachments
Assault rifle – The flagship rifle of the M4 platform. This reliable workhorse is a jack-of-all-trades that performs well in most combat scenarios.
| Level | Unlock | Type |
| 2 | SZ Lonewolf – optic | Universal attachment |
| 3 | Echoline GS-X – muzzle | Universal attachment |
| 4 | 11.5” T-H4 Barrel – barrel | M4 platform attachment |
| 5 | 45 Round Mag – magazine | M4 platform attachment |
| 6 | FSS Sharkfin 90 – underbarrel | Universal attachment |
| 7 | Corio Precio Factory – stock§ | M4 platform attachment |
| 8 | Sakin ZX – rear grip | M4 platform attachment |
| 9 | 5.56 Armor Piercing – ammunition | Universal attachment |
| 10 | Tempus Trench Pro – barrel | M4 platform attachment |
| 11 | Tempus P80 Strike – stock | M4 platform attachment |
| 12 | 1MW Laser Box – laser | Universal attachment |
| 13 | FTAC Recon – receiver | New weapon |
| 14 | Demo D50 Buffer Tube – stock | M4 platform attachment |
| 15 | Hightower 20” Barrel – barrel | M4 platform attachment |
| 16 | Xten Grip – rear grip | M4 platform attachment |
| 17 | 60 Round Mag – magazine | M4 platform attachment |
| 18 | 556 Icarus – reciever | New weapon |
| 19 | Demo Fade Pro – stock | M4 platform attachment |
| 20 | Weapon tuning | Fine-tune attachment performance on this weapon |
Unlocking FTAC Recon Attachments in CoD MW2
Battle rifle – A high powered .458 battle rifle that delivers severe damage at medium range.
| Level | Unlock | Type |
| 2 | Optic category | Equip optic attachments to this weapon |
| 3 | 5 Round Mag – magazine | M4 platform attachment |
| 4 | .458 Frangible – ammunition | Universal attachment |
| 5 | FTAC Dreadnought – muzzle | Universal attachment |
| 6 | 419mm EXF – barrel | M4 platform attachment |
| 7 | Rear grip category | Equip rear grip attachments to this weapon |
| 8 | Ravage-8 – stock? | M4 platform attachment |
| 9 | .458 Overpressure +P – ammunition | Universal attachment |
| 10 | Underbarrel category | Equip underbarrel attachments to this weapon |
| 11 | Shred CP90 – muzzle | Universal attachment |
| 12 | Drexsom Prime-90 – optic | Universal attachment |
| 13 | .458 High Velocity – ammunition | Universal attachment |
| 14 | Laser category | Equip laser attachments to this weapon |
| 15 | Support CP90 Grip – rear grip | M4 platform attachment |
| 16 | FSS Hurricane – receiver | New weapon |
| 17 | .458 Hollow Point – ammunition | Universal attachment |
| 18 | 7.5” Tempus Firebrand – barrel | M4 platform attachment |
| 19 | Demon Helix T7 – muzzle | Universal attachment |
| 20 | 15 Round Mag – magazine | M4 platform attachment |
| 21 | .458 Armor Piercing – ammunition | Universal attachment |
| 22 | Bull Rider 16.5” – barrel | M4 platform attachment |
| 23 | Weapon tuning | Fine-tune attachment performance on this weapon |
Unlocking the Red Dot Sight & Other FSS Hurricane Attachments (CoD Modern Warfare 2)
Submachine gun – the FSS Hurricane sacrifices range and stopping power for increased ammo capacity and enhanced stability.
| Level | Unlock | Type |
| 2 | Optic category | Equip optic attachments to this weapon |
| 3 | Cronen Mini Red Dot – optic | Universal attachment |
| 4 | Laser category | Equip laser attachments to this weapon |
| 5 | Xten Razor Comp – muzzle | Universal attachment |
| 6 | Rear grip category | Equip rear grip attachments to this weapon |
| 7 | FSS Cannonade 16” – barrel | M4 platform attachment |
| 8 | Underbarrel category | Equip underbarrel attachments to this weapon |
| 9 | Demo Quicksilver Collapsed – stock | M4 platform attachment |
| 10 | FSS-X7 – barrel | M4 platform attachment |
| 11 | 5.7X28mm Hollow Point – ammunition | Universal attachment |
| 12 | Phantom Grip – rear grip | M4 platform attachment |
| 13 | XRK Knockout Breach – muzzle | Universal attachment |
| 14 | Demo Quicksilver Stock – stock | M4 platform attachment |
| 15 | Weapon tuning | Fine-tune attachment performance on this weapon |
How to Unlock the 556 Icarus attachments in Modern Warfare 2
Light machine gun – The 556 Icarus is a lightweight squad-support weapon in the M4 platform. Increased ammo capacity does not significantly impact mobility.
| Level | Unlock | Type |
| 2 | Underbarrel category | Equip underbarrel attachments to this weapon |
| 3 | Muzzle category | Equip muzzle attachments to this weapon |
| 4 | FTAC Coldforge 16” Barrel – barrel | M4 platform attachment |
| 5 | Optic category | Equip optic attachments to this weapon |
| 6 | 100 Round Box Mag – magazine | M4 platform attachment |
| 7 | Laser category | Equip laser attachments to this weapon |
| 8 | Demo Precision Elite Factory – stock? | M4 platform attachment |
| 9 | Forge Tac Delta 4 – optic | Universal attachment |
| 10 | FTAC Castle Comp – muzzle | Universal attachment |
| 11 | Rear grip category | Equip rear grip attachments to this weapon |
| 12 | FTAC SB – barrel | M4 platform attachment |
| 13 | M16 – receiver | New weapon |
| 14 | VX Pineapple – underbarrel | Universal attachment |
| 15 | Ammo category | Equip ammunition attachments to this weapon |
| 16 | Weapon tuning | Fine-tune attachment performance on this weapon |
Unlocking M16 attachments: CoD MW2 M4 Platform Attachments
Assault rifle – Tuned for mid to long-range engagements, the M16 features a 3-round burst rifle that has increased range and stability.
| Level | Unlock | Type |
| 2 | Muzzle category | Equip muzzle attachments to this weapon |
| 3 | 14” Carbine Shroud – barrel | M4 platform attachment |
| 4 | Laser category | Equip laser attachments to this weapon |
| 5 | C400 Door Knocker – muzzle | Universal attachment |
| 6 | Rear grip category | Equip rear grip attachments to this weapon |
| 7 | 15 Round Magazine – magazine | Universal attachment |
| 8 | Optic category | Equip optic attachments to this weapon |
| 9 | 11.5” Carbine Shroud – barrel | M4 platform attachment |
| 10 | Underbarrel category | Equip underbarrel attachments to this weapon |
| 11 | SZ Pro-7 – optic | Universal attachment |
| 12 | Stock category | Equip stock attachments to this weapon |
| 13 | SPW 40mm – underbarrel | Universal attachment |
| 14 | Ammo category | Equip ammunition attachments to this weapon |
| 15 | D15 Grip – rear grip | M4 platform attachment |
| 16 | Weapon tuning | Fine-tune attachment performance on this weapon |
And there you have it; all of the attachments for the M4 weapon platform. There’s no reason not to use the time grinding these out to work towards unlocking camos too, if you’re that way inclined. Make sure to check out our guide on how to level up guns faster in MW2 to get through these unlocks quicker, too.
