Looking to dominate the battlefield in Modern Warfare 3? The BAS-B battle rifle has surged to the top of the meta, renowned for its devastating power and pinpoint accuracy across all platforms. Whether you’re hunting for the perfect mid-range build or a stealthy class setup, the right BAS-B loadout can turn you into a force to be reckoned with-if you know how to unlock its full potential.
However, they’re not as suited to close quarters combat, so you can’t be runnin’ and gunnin’ with these weapons, and you need to make sure you hit your shots because the magazine sizes are typically a little smaller than assault rifles.
Here’s the best BAS-B loadout in MW3, and all the details on how to unlock it. Looking for other weapons to try? Our list of best guns can steer you in the right direction.
How to unlock the BAS-B in Modern Warfare 3
To unlock the BAS-B battle rifle in Modern Warfare 3, you simply need to reach player rank 17. You can level up quickly by earning experience points (XP) through playing multiplayer matches, completing objectives, and eliminating enemies. Using Double XP tokens can help speed up this process even further. Alternatively, if you play the Zombies mode, you can also unlock the BAS-B by successfully extracting with the weapon in your inventory. Once unlocked, the BAS-B becomes available across all game modes, allowing you to start customizing it with attachments and building your ideal loadout.
To unlock the BAS-B in Modern Warfare 3, you must reach level 17. Unlike some of the guns in multiplayer, it is unlockable solely by ranking up with XP, rather than requiring an armory unlock.
The BAS-B’s main competitors are the SVA 545 and MCW assault rifles; the former is unlocked super early at level four, while the latter isn’t unlocked until level 44, so the BAS-B is a solid option in the interim between the two.
Best BAS-B loadout in Modern Warfare 3
The BAS-B stands out as one of the most versatile and powerful battle rifles in Modern Warfare 3, offering a balanced mix of damage, range, and accuracy that makes it a top pick for many players. The best BAS-B loadout maximizes these strengths by equipping attachments such as the VT-7 Spiritfire Suppressor L (for recoil control and stealth), Bruen Venom Long Barrel (for increased range and damage), and the Bruen Laur4 Light Precision Stock (for better recoil control and movement speed). Pairing these with a reliable optic like the MK.3 Reflector or Jak Glassless ensures clear target acquisition, while a 45 Round Mag helps maintain firepower during extended engagements. This setup transforms the BAS-B into a dominant force in multiplayer, capable of excelling in both mid- and long-range fights while maintaining solid handling and mobility.
Here is the best BAS-B loadout in Modern Warfare 3:
- Muzzle: VT-7 Spiritfire Suppressor L
- Barrel: Bruen Venom Long Barrel
- Underbarrel: VX Pineapple
- Rear Grip: STT88 Grip
- Optic: SZ Lonewolf Optic
As is usually the case with Optic attachments, it’s mostly down to personal preference; the SZ Lonewolf is a holographic sight with only a small amount of magnification, but if you’d rather something more precise, go for something with a 4x zoom. The rest of the attachments here all focus on recoil management, accuracy, and damage range.
The VT-7 Spiritfire Suppressor is the only must-have, as it adds a silencer to the gun so you’re not detectable by radar, plus it adds recoil control, bullet velocity, and damage range. The Zulu-60 muzzle does similar, but it doesn’t offer the same damage range bonus.
The Bruen Venom Long Barrel also comes highly recommended for the same reasons, while the VX Pineapple and STT88 Grip can be switched out if desired. One other attachment you could consider is the .277 High Grain Rounds ammunition, although you’ll need to account for the negative recoil effect they provide elsewhere.
Best BAS-B class in Modern Warfare 3
The best BAS-B class in Modern Warfare 3 focuses on maximizing the rifle’s balanced strengths-high damage, accuracy, and manageable recoil-while boosting mobility and versatility for all multiplayer scenarios. The optimal setup typically features attachments like the VT-7 Spiritfire Suppressor L for recoil control and stealth, the Bruen Venom Long Barrel for increased range and damage, the MK.3 Reflector for clear sightlines, the Bruen Laur4 Light Precision Stock for added movement speed and recoil control, and the Chewk Angled Grip to smooth out aiming and further improve handling. For perks and equipment, pairing the BAS-B with an Infantry Vest, Commando Gloves, Stalker Boots, and a Mag Holster ensures faster reloads, better strafe speed, and longer Tac Sprint duration, making the class effective across all maps and situations. This combination allows players to dominate mid-to-long range engagements while staying agile and ready for close encounters.
Here is the best class to use alongside the BAS-B in Modern Warfare 3:
- Vest: Gunner Vest
- Secondary: Riveter
- Tactical: Smoke Grenade
- Lethal: Breacher Drone
- Field Upgrade: Munitions Box
- Gloves: Marksman Gloves
- Gear: Threat Identification System
As you’d expect, if you’re rocking this build, you want to be positioned somewhere high, with cover, picking enemies off as they go for the objective. The suppressor means you won’t show up on the radar, but every now and then, you’ll need to deal with enemies up close, which is where the Gunner Vest and Riveter shotgun come in.
This is the best shotgun in the game, so you can breach and clear rooms with ease.
With a Smoke Grenade, you can block off sight lines if you have too many areas to cover while your teammates respawn, so you shouldn’t get picked off where you aren’t looking. The Breacher Drone will help you finish off enemies that you weaken, while the Munitions Box is there for ammo as you will quickly run out.
How can I optimize the BAS B for maximum damage and accuracy in MW3 Season 5
Optimizing the BAS-B for Maximum Damage and Accuracy in MW3 Season 5
To achieve the highest damage and accuracy with the BAS-B in Modern Warfare 3 Season 5, focus on attachments that boost recoil control, range, and handling while ensuring you have enough ammunition for sustained firefights.
Recommended BAS-B Attachments:
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Muzzle: VT-7 Spiritfire Suppressor L
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Suppresses shots, improves recoil control, and increases damage range.
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Barrel: Bruen Venom Long Barrel
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Further boosts bullet velocity, range, and recoil control.
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Underbarrel: Bruen Heavy Support Grip or Chewk Angled Grip
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Enhances gun kick control and aiming stability, making the weapon more accurate during sustained fire.
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Stock: Bruen LAUR4 Light Precision Stock
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Increases recoil control and movement speed, helping with both accuracy and mobility.
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Optic: Jak Glassless or MK.3 Reflector
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Provides a clear sight picture, reducing visual recoil and improving target acquisition.
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Magazine: 45 Round Mag
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Extends firing time, reducing the need for frequent reloads during engagements.
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Key Tips:
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Avoid using iron sights due to the BAS-B’s high visual recoil; a dedicated optic is strongly recommended for clarity.
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The 45-round magazine is crucial for maintaining pressure without constant reloads, especially given the BAS-B’s high fire rate.
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While some attachments slightly reduce mobility or ADS speed, the overall handling remains strong, making this build suitable for aggressive and mid-range playstyles.
This setup ensures your BAS-B delivers maximum damage output with excellent accuracy and control, keeping you competitive in all MW3 Season 5 scenarios.
What combination of attachments boosts both damage and accuracy in MW3 Season 5
BAS-B Attachments for Maximum Damage and Accuracy in MW3 Season 5
To boost both damage and accuracy for the BAS-B in Modern Warfare 3 Season 5, combine attachments that enhance recoil control, bullet velocity, and damage multipliers:
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Muzzle: VT-7 Spiritfire Suppressor L
Increases damage range, improves recoil control, and keeps you off the radar. -
Barrel: Bruen Venom Long Barrel
Further boosts bullet velocity and range, enhancing both damage output and accuracy. -
Underbarrel: Bruen Heavy Support Grip or similar
Improves gun kick control and aiming stability for more accurate sustained fire. -
Optic: MK.3 Reflector
Provides a clear sight picture, reducing visual recoil and helping with precision shots. -
Magazine: 45 Round Magazine
Ensures you have enough ammo for longer engagements without sacrificing handling.
Additionally, the latest Season 5 patch increased the BAS-B’s upper and lower leg, and foot damage multipliers by 10%, making these attachments even more effective for maximizing damage.
This combination is designed to deliver high damage and pinpoint accuracy, making your BAS-B competitive in all multiplayer scenarios.
