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Modern Warfare 3andWarzonefeatures a long line of weapons, allowing players to pick, choose, and customize them according to their liking. Though many of these weapons, likethe AMR9andthe Riveter, have never been seen before, others are returning weapons from previous games. TheBruen MK9for example, is a returning weapon fromModern Warfare 2019, and is sure to become a popular choice in Warzone.
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The Bruen MK9 is a weapon you canunlock upon reaching Level 31in Modern Warfare 3. It is a Light Machine Gun sporting one of the best levels of fire rate, accuracy, and recoil control of its weapon category. The Bruen MK9 is an exceptional choice for Modern Warfare 3, but can be made even better with the right attachments and loadout.

Updated by Nathan Round on 2nd January 2024:We have updated this guide to provide an additional Bruen MK9 build for Warzone, along with additional Secondary and Perk Package recommendations.
Best Bruen MK9 Modern Warfare 3 Build
Our below Bruen MK9 build has been built specifically for Modern Warfare 3 Core Multiplayer. Running the below attachments boosts handling, mobility, recoil control, and accuracy.
Attachments
MONOLITHIC SUPPRESSOR (Muzzle)
FTAC SP-10 ANGLED GRIP (Underbarrel)
VLK LZR 7MW (Laser)
MK. 3 REFLECTOR (Optic)

60 ROUND DRUM (Magazine)
Best Bruen MK9 Warzone Build
Our second Bruen MK9 build is tailored specifically for Warzone. Equipping the below attachments will boost range, accuracy, and recoil control - at the cost of a small amount of mobility and handling.
VT-7 SPRINTFIRE SUPPRESSOR (Muzzle)
23'' XRK HORIZON V2 (Barrel)
BRUEN HEAVY SUPPORT GRIP (Underbarrel)
CORIO EAGLESEYE 2.5X (Optic)
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Recommended Perks
Engineer Vest
Scavenger Gloves
Running Sneakers
Mag Holster
Ghost T/V Camo
The above Perk Package is carried over from some of our other Light Machine Gun builds, and for good reason. Utilizing these Perksboosts mobility(which is a definite must for LMGs), along withboosting reload speed and resupplying ammunition. We have also included theGhost T/V Camo, eliminating the need to carry a launcher.
For your Bruen MK9 loadout in Warzone, we recommend the following Perks:Double Time, Sleight Of Hand, Tempered, and Ghost.

Recommended Secondary
The Bruen MK9 is quite effective for mid-to-long-range engagements in Modern Warfare 3’s Core Multiplayer. However, though we have boosted its handling and mobility with our Multiplayer build, the reload speed can still be a hindrance sometimes. With that being the case, consider equipping a backup secondary liketheWSP Stinger,theTYR, ortheRenetti.
For Warzone, you can still run one of the aforementioned Handguns. However, if you want a better swap-to-secondary, then look no further than the Submachine Gun category. Some of our top picks among all SMGs includetheWSP Swarm,theStriker, andtheRival-9.

Modern Warfare 3 & Warzone MCW: Best Attachments & Best Loadout
Using the MCW Assault Rifle in Modern Warfare 3 and Warzone? Here are the best attachments and the best loadout for it!
