Best MK4 Build for Delta Force
MK4 is one of Season 11's biggest risers. It got several buffs in 2026 — more benefit from the Accuracy attribute, Fencer Barrel armor penetration 30 → 35, and Deep Space Chrome Barrel damage 32 → 34 and armor penetration 27 → 30 — and as of Oct 6 it was rated SSS in S11 Operations tier lists and SSS for value. It can use level-5 ammo and reaches around a 0.3 s TTK class against gold armor, and the barrel swap still switches between 3-round burst and full-auto (the full-auto barrel trades some base damage). S11's 4.6x30 FMJ ST / AP ST rounds (1.25x head and chest) suit it.
GUNSMITH CODE
Full Build
Popular Build Options
Pick the build that fits you
500,000Full Build
3-burst hip-fire build with maximum stability
MK4 Submachine Gun-Operatio...
480,000Mid-Tier Build
Balanced 3-burst hip-fire build
MK4 Submachine Gun-Operatio...
450,000Budget Build
Entry-level 3-burst hip-fire build
MK4 Submachine Gun-Operatio...How to Build Your MK4
Apply Your MK4 Build in Three Simple Steps
Step 1 — Copy Build Code
Click the Copy Code button to copy the MK4 build code to your clipboard.
Step 2 — Import in Game
Open Modify → Loadouts → Import, paste the code, and apply to your MK4.
Step 3 — Purchase & Save
Purchase missing attachments in Modify, then save the loadout.
Frequently Asked Questions
Everything you need to know about mastering this weapon
It's one of the best. S11 tier lists moved it from S to SS in August and to SSS in October for Operations, with an SSS value grade; it is S in Warfare. It can use level-5 ammo and reaches around a 0.3 s TTK class against gold armor.
May 21, 2026 (Operations): Deep Space Chrome Barrel hip-fire -8 → +4 but stability +6 → +3. July 30, 2026 (Operations): more benefit from the Accuracy attribute, MK4 Fencer Barrel armor penetration 30 → 35, Deep Space Chrome Barrel damage 32 → 34 and armor penetration 27 → 30, but its hip-fire went back to -8 with more spread during sustained hip-fire. Warfare also got the Accuracy benefit buff.
MK4 offers extremely flexible customization. Its solid base stats mean any build works well. We recommend the 3-burst hip-fire playstyle for maximum effectiveness.
Absolutely! MK4's biggest advantage is its extremely low recoil, making it very easy to control. Even complete beginners can handle it with ease.
3-burst (Fencer/standard barrel): higher burst potential, great for tap-fire experts, and a strong value pick with gold ammo on Classified maps. Full-auto barrel: very high close-range kill efficiency and easier recoil control, at slightly lower base damage. Some S11 guides still give the burst barrel a slight overall edge, with full-auto better against red armor.
S11 added season-limited 4.6x30 FMJ ST (penetration 4) and AP ST (penetration 5) rounds with 1.25x head and chest damage and 0.9x abdomen and limbs. The 4.6x30 CT round (penetration 0) deals 1.85x limb damage but lowers fire rate by 15%, adds ADS spread and can't go in the Safe Box.
The switchable barrel system. Long/standard barrel gives 3-burst mode, short barrel gives full-auto. Two completely different playstyles in one weapon.
Three simple steps: 1) Click the Copy Code button on any build card above. 2) In-game, open Modify → Loadouts → Import, paste the code, and apply it to your MK4. 3) Click Purchase to buy any missing attachments, then save the loadout. Done.
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