Modern Warfare 3 has plenty of new guns to try in custom loadouts, but with so many to choose from, picking a primary weapon in MW3 can be tricky.
That’s why we’ve compiled this handy list of the 5 best guns in the game, alongside the meta attachments and weapon build for each of them!
The top 5 best guns to use in Modern Warfare 3 Multiplayer are:
- KV Inhibitor
- MTZ-556
- Striker
- MCW
- WSP Swarm
All of these weapons are extremely powerful, but for different reasons. However, no matter your play style, there is a meta weapon for you!
We have got the meta loadouts for each of these weapons below, alongside why we think they are so strong!
5. KV Inhibitor
The KV Inhibitor is the best sniper rifle to use in MW3 Multiplayer, as it has great damage and accuracy, and is perfect for quickscoping!
Use the loadout below to give this powerful sniper an extremely snappy ADS time:
| Attachment | How to Unlock |
| FSS OLE-V Laser (Laser) | MTZ Interceptor Level 11 |
| Ivanov Wood Stock (Stock) | KV Inhibitor Level 6 |
| DR-6 Handstop (Underbarrel) | WSP Swarm Level 23 |
| 5 Round Magazine (Ammunition) | KV Inhibitor Level 11 |
| FSS Stormender Assault Grip (Rear Grip) | KV Inhibitor Level 33 |
4. MTZ-556
The MTZ-556 is a great assault rifle for Modern Warfare 3 loadouts, as it has a quick fire rate, low recoil, and a pretty fast time-to-kill.
This makes it a very powerful choice for both mid-range and close-range combat.
| Attachment | How to Unlock |
| Casus Brake (Muzzle) | KV Inhibitor Level 5 |
| MTZ Clinch Pro Barrel (Barrel) | MTZ-556 Level 4 |
| MK. 3 Reflector (Optic) | MTZ-556 Level 2 |
| Chewk Angled Grip (Underbarrel) | Longbow Level 11 |
| Bruen TR-24 Assault Grip (Rear Grip) | MTZ-556 Level 9 |
3. Rival-9
The Rival-9 is the best full-sized SMG in MW3. It and has very fast handling and mobility, in addition to solid range for an SMG.
However, what makes the Rival-9 so great is its rapid fire rate, which makes the gun particularly forgiving to use when combined with the controllable recoil.
| Attachment | How to Unlock |
| Monolithic Suppressor S (Muzzle) | Rival-9 Level 7 |
| Rival 38-E Fire Starter Barrel (Barrel) | Rival-9 Level 16 |
| MK. 3 Reflector (Optic) | MTZ-556 Level 2 |
| Chewk Angled Grip (Underbarrel) | Longbow Level 11 |
| Rival Vice Assault Grip (Rear Grip) | MTZ-762 Level 6 |
2. MCW
Our top pick for the best assault rifle is the MCW – Modern Warfare 3’s version of the OG MW2’s ACR.
It is a very well-balanced gun that is effective at all ranges and also has a very fast time-to-kill!
| Attachment | How to Unlock |
| Shadowstrike Suppressor (Muzzle) | Longbow Level 11 |
| Second Line Mammoth Heavy Barrel (Barrel) | MCW Level 18 |
| MK. 3 Reflector (Optic) | MTZ-556 Level 2 |
| 40 Round Mag (Magazine) | MCW Level 6 |
| RB Claw-PSL Grip (Rear Grip) | MCW Level 3 |
1. WSP Swarm
Our favorite gun in MW3 Multiplayer loadouts so far is the WSP Swarm. This pocket-sized weapon kills faster than any other SMG in the game and has extremely quick movement speed and handling!
While it has considerable recoil, this is easily fixed with a few attachments. With this loadout, you’ll be shredding through opposing players at record speeds!
| Attachment | How to Unlock |
| WSP Infiltrator Integrated Suppressor (Barrel) | WSP Swarm Level 22 |
| MK. 3 Reflector (Optic) | MTZ-556 Level 2 |
| FSS Fortress Heavy Stock (Stock) | WSP Swarm Level 3 |
| Lockgrip Precision-40 (Underbarrel) | MCW Level 6 |
| Marauder Grip (Rear Grip) | WSP-9 Level 16 |
Be sure to give all of these best MW3 Multiplayer loadouts a try. You never know which one will be your favorite!