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The U100 MK5 in real life

The Ultimax U-100 MK5  is a Singapore-made 5.56mm light machine gun, developed by the Chartered Industries of Singapore (CIS, now ST Kinetics). The MK 5 variant is an updated version of the MK 4, which was developed for the USMC's Infantry Automatic Rifle competition; the Ultimax lost to the HK's M416-based M27.

Battlefield 4


The U-100 MK5 is a light machine gun introduced in Battlefield 4. It can be found as a collectible in South China Sea equipped with a Prisma sight and bipod.


The U-100 MK5 appears in the Battlefield 4 multiplayer as the first LMG for the Support class. Its initial attachments are an HD-33 sight, Magnifier, Muzzle Brake, and bipod

Much like the Assault class SAR-21, it has a low rate of fire, moderate damage, and very good stability. Due to the low recoil, the Muzzle Brake or Compensator are unnecessary.

The Stubby or Potato grips further increase accuracy in full-auto, while the Ergo and Vertical grips help with mobility. Using a Angled or Folding grip completely cancels out the first-shot multiplier on the U-100 MK5, enabling accurate tap-fire and tight shot grouping in short bursts.

The heavy barrel can be added to add much accuracy to this weapon, but recoil becomes an almost major problem.


If iron sights are used in multiplayer, a rendering bug may occur whereas the sights do not show up for a few brief moments in a similar fashion the F2000 bug in the Battlefield 3 co-op mission The Eleventh Hour.

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