- Firing ADS Movement Speed penalty reduced from 30% to 25%.
Weapons / LMG
MK.78
1 · PICK YOUR STYLE
2 · SET YOUR WEAPON LEVEL
All-rounder at LV 50: 5 of 5 final
Level
LV 50
150
Unlocked 49/49
Complete
SC // WEAPON INTEL
GUNSMITH · LV 50
LOADOUT BUILDER
Your build · 5/5
S100/100 · Excellent100% match with our All-rounder build
MuzzleGreaves A-762LV 6
Barrel20" Mach-78 BarrelLV 3
UnderbarrelEnhance-32 HandstopLV 2
Rear GripTrailblaze GripLV 10
MagazineSwift Feed Fast BeltLV 11
Laser
5 of 5 unlocked at LV 50
LV 72mw Adaptive Tactical LaserTactical laser: faster aiming in tactical stance (visible laser). (Tactical Laser)Unlocked
LV 14Convergence Box LaserSteady laser: steadier aim while aiming down sights. (Steady Aim Laser)Unlocked
LV 335mW Lockstep LaserSteady laser: steadier aim while aiming down sights. (Strelok Laser)Unlocked
LV 411mW Instinct Laser ArrayHandling laser: faster aiming and sprint-to-fire (visible laser). (Handling Laser)Unlocked
LV 493mW Motion Strike LaserSteady laser: steadier aim while aiming down sights. (Stable Range Laser)Unlocked
PERFORMANCE
Damage range
Latest balance changes
Full history (5)- Maximum Damage Range: less damage
- Medium Damage Range: less damage
Attachments tuned:MFS Heatshield Belt Fed
Source: official patch notes ↗Alternatives in this class
All weapons
MK.78 FAQ
What is the best MK.78 build?
We have ready builds for the MK.78: mid range, prestige, all-rounder, long range. Pick a style and your weapon level in the lab above and we equip the right parts for that level, with stand-ins until the parts unlock.
What is the MK.78 max level?
The MK.78 maxes out at weapon level 50. After that you can enter weapon prestige and unlock its prestige attachment.
How many attachments does the MK.78 have?
We list 55 compatible attachments for the MK.78 across 9 slots, each with its unlock level and what it does.
What is the MK.78 prestige attachment?
The prestige attachment is the MFS Heatshield Belt Fed. It unlocks after you reach max level and enter weapon prestige.
Was the MK.78 changed recently?
The last official change to the MK.78 was in Season 03 (2026-03-31). The patch notes have changed it 5 times since launch — all listed in the History tab.
What are the alternatives to the MK.78?
In the same class: XM325, Mammoth, Sokol 545. Each has its own page with level-by-level builds.
Sign in to save this build and track weapon level. The page stays usable without an account.
Build for my level
Enter your MK.78 level and pick a playstyle to get a useful build.
25
Playstyle
Close = short fights · Balanced = general · Long = longer range
Best available now
Exact image unavailable — Optic
SPECIAL CODE category presentation — not the exact attachment geometry.
Optic
Greaves AccuSpot 3x
Optic
AVAILABLE NOW
Optic: a sight for clearer aiming.
Exact image unavailable — Underbarrel
SPECIAL CODE category presentation — not the exact attachment geometry.
Underbarrel
Enhance-32 Handstop
Underbarrel
AVAILABLE NOW
Steady foregrip: steadier aim and less sway.
Exact image unavailable — Barrel
SPECIAL CODE category presentation — not the exact attachment geometry.
Barrel
20" Mach-78 Barrel
Barrel
AVAILABLE NOW
Velocity barrel: faster bullets for long fights.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Bowen Modulator 7.62
Muzzle
AVAILABLE NOW
Muzzle brake: less gun kick and vertical recoil.
Exact image unavailable — Magazine
SPECIAL CODE category presentation — not the exact attachment geometry.
Magazine
Swift Feed Fast Belt
Magazine
AVAILABLE NOW
Fast mag: faster reload.
Next useful unlock
Level 26 → PrismaTech Turbo 4x
Max-level build
Exact image unavailable — Barrel
SPECIAL CODE category presentation — not the exact attachment geometry.
Barrel
20" Mach-78 Barrel
Barrel
AVAILABLE NOW
Velocity barrel: faster bullets for long fights.
Exact image unavailable — Underbarrel
SPECIAL CODE category presentation — not the exact attachment geometry.
Underbarrel
Enhance-32 Handstop
Underbarrel
AVAILABLE NOW
Steady foregrip: steadier aim and less sway.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Bowen Modulator 7.62
Muzzle
AVAILABLE NOW
Muzzle brake: less gun kick and vertical recoil.
Exact image unavailable — Rear Grip
SPECIAL CODE category presentation — not the exact attachment geometry.
Rear Grip
LTI Precision Grip
Rear Grip
Needs Weapon Level
Stabilization grip: less horizontal recoil, slightly slower aiming.
Exact image unavailable — Fire Mods
SPECIAL CODE category presentation — not the exact attachment geometry.
Fire Mods
7.62 NATO Overpressured
Fire Mods
AVAILABLE NOW
High-velocity ammo: faster bullets and more range.
Prestige build
Exact image unavailable — Magazine
SPECIAL CODE category presentation — not the exact attachment geometry.
Magazine
MFS Heatshield Belt Fed
Magazine
Needs Weapon Prestige
Takes longer to overheat and improves mobility in addition to removing movement penalties when…