Best Modern Warfare 4 Loadouts: ISO Nightshade, M4 and Kastov 762
Three ready classes at launch and what changed since release
Modern Warfare 4 came out on October 23, 2026 on PS5, Xbox Series X/S, PC and Switch 2. In multiplayer the easiest way in is three classes: ISO Nightshade for close range, M4 for all-round play and Kastov 762 for players who value damage over speed. All three are built from weapons that lead the meta: in CODMunity's weekly report before launch the M4 ranked first, followed by ISO Nightshade and Kastov 762 (beta-era data and player picks, not official statistics).
Classes are built in Create-a-Class, where the Operator, weapons, equipment and killstreaks are set up in one place. If you are just starting, leveling comes first: Create-a-Class opens at level 4, and the ISO Nightshade is usable right after that.
The game has already seen several changes. On October 28 the ISO Nightshade, M4 and Kastov 762 each got small damage buffs, and Quick Fix is now interrupted by taking damage. Season 1 started on November 6 with the new maps Backstab, Canyon and Shoot House, and weapon balance keeps shifting. Treat the classes below as a base that you tune to your map and playstyle.
How perks work in Create-a-Class
Perks are split into three slots with six choices in each, and a class takes exactly one perk per slot. You cannot stack three favorites if two of them share a slot.
Here is how the perks used in the classes below are spread across the slots:
Perk 1: Quick Fix (unlocks at level 4), Ghost (level 24).
Perk 2: Blood Rush (4), Bomb Squad (16), Fast Hands (20), Ninja (30).
Perk 3: Battle Hardened (12), Tracker (32).
The key points for speed: Blood Rush enables Tactical Sprint, which is no longer a default. Ghost hides you from UAVs, Portable Radars and Heartbeat Sensors. Quick Fix starts health regeneration, but since the October 28 patch any damage interrupts it, so it is weaker in open fights than it used to be.
Ninja, Fast Hands, Blood Rush and Bomb Squad share one slot. That makes swapping between them an easy experiment: the weapon and recoil stay the same while the way you play changes noticeably.
ISO Nightshade: an SMG for players who never stand still
The ISO Nightshade suits players who keep moving between objectives and trade kills for tempo. It is an SMG, and the October 28 patch buffed SMGs overall. To speed up unlocking this kind of gun, there is a submachine guns leveling service, and the attachments themselves depend on weapon leveling.
Primary: ISO Nightshade, secondary Krait P68, melee Knife.
Equipment: Flash Grenade, Semtex (sticky grenade), Portable Radar.
Perks: Quick Fix, Blood Rush, Tracker.
Killstreak: UAV at 4 kills.
Quick Fix plus Blood Rush builds the class around one idea: win a fight, regain health and sprint into the next one. Blood Rush grants Tactical Sprint, while Quick Fix starts health regeneration. Remember that damage interrupts the healing, so break line of sight after a duel before you push. Tracker, according to player reports, helps you track enemies and fills the third slot.
Throw the Portable Radar near contested objectives rather than in an empty corridor, or it is wasted. Semtex stays a handy way to dig enemies out of cover.
According to WZStats, the all-round ISO Nightshade build uses five attachments:
Muzzle: FSS Crackdown (level 4), barrel ZLR Carbon-900 (35).
Rear grip: Demo STP-1 (6), stock GI-80 Milspec Stock (15).
Laser: XRK Clutch-LS (29).
Until everything is unlocked, you can run a lighter version with the ZLR MAG-Z 9" barrel and 9mm Parabellum Frangible ammo.
M4: the all-round class for leveling and standard 6v6
The M4 works best as the first weapon you level to unlock attachments. It was the most used gun in the beta, and in the full game it remains the most flexible: it handles both close and mid range. If you want the rifle fully built quickly, there is an assault rifles leveling service.
Primary: M4, secondary Krait P68, melee Knife.
Equipment: Snapshot Grenade, Zip Gun, Riot Shield.
Perks: Ghost, Fast Hands, Tracker.
Killstreak: Attack Helicopter at 10 kills.
Fast Hands speeds up reloads, weapon swaps and equipment use, which suits an all-round rifle. Ghost covers you against detection tools, and Tracker helps you find enemies. If you prefer playing quietly, swap Fast Hands for Ninja, which dampens your footsteps. Blood Rush also fits that slot, but you lose the faster reloads.
The WZStats M4 build skips the optic:
Muzzle: FSS IS300 (level 4).
Underbarrel: FSS Fireline Grip (37), rear grip ZLR Phase Grip (52).
Stock: ZLR ASP50 Stock (42), laser SA LAZ-500 (24).
The ZLR Phase Grip at level 52 is the last big unlock. Until then you can run an interim setup: Slimline Elite (13), FSS IS300 (4), PF1 Fixed Stock (14), SZ Gen.6 PEQ (2) and 5.56 NATO Overpressured ammo (3). If you dislike the default sights, swap one attachment for an optic instead of forcing yourself to get used to them.
Kastov 762: a class built on damage and positioning
The Kastov 762 fits players who care more about damage per shot than constant movement. It is a positional weapon: hold mid-range angles, manage recoil and land the first shots. It forgives less than the M4 up close, so if you miss often, play a bit more carefully.
Primary: Kastov 762, secondary Krait P68, melee Knife.
Equipment: Concussion Grenade, Semtex, Trophy System.
Perks: High Alert, Bomb Squad, Battle Hardened.
Killstreak: Artillery Beacon at 6 kills.
This class plays for survival. Bomb Squad, according to player reports, softens explosive damage. Trophy System is meant to counter incoming equipment, so the pair works well on objectives where enemies keep throwing equipment. Battle Hardened weakens enemy tactical equipment, and the Concussion Grenade lets you open a fight on your terms. If you need mobility, swap Bomb Squad for Blood Rush.
The WZStats all-round build includes an optic:
Optic: Cronen Zero-K (level 35), barrel FJX Ghostfire 16.3" (61).
Underbarrel: FSS Tac90 Grip (47), stock Kastov Dogfighter 27 (42).
Laser: Schlager Visiv-5 (30).
The level 61 barrel is the most expensive attachment across all three classes, so build the setup gradually. Start with the optic and whichever handling attachments you already have. The weapon is usable well before the last barrel unlocks.
Krait P68: the backup gun for all three classes
All three classes use the Krait P68 as the secondary. It is a modest pick, but as an emergency option it does the job: you switch to it when reloading is unsafe or an enemy catches you at point-blank range. For sidearms, the catalog has a separate handguns leveling service.
According to WZStats, the Krait P68 build looks like this:
Apex: Krait P68 Commando (level 34), muzzle SFO Proto-33 (25).
Barrel: XRK DOC-40 6" (21), rear grip Magtac .45 (5).
Laser: GW 700-V (18), trigger action P68 Tapper 9 (29).
The earliest attachment here is the Magtac .45 at level 5. According to WZStats, the Commando Apex attachment adds a knife to the pistol's grip. For how Apex attachments work in general, see the separate Apex Attachments guide on DVING. Do not level the Krait before your main weapon: the pistol is a backup tool here.
Choosing a class for the map and mode
You do not need one class for every map. Save all three and switch as the situation demands.
Class | Best for | Playstyle |
|---|---|---|
ISO Nightshade | Tight maps and fast pushes to the objective | Aggressive, lots of movement |
M4 | Mixed ranges, standard 6v6, unlocking attachments | All-round, relaxed |
Kastov 762 | Long lanes and defending objectives | Positional, damage-focused |
Swap perks first and attachments second. Swapping between Ninja, Fast Hands and Blood Rush changes how a class plays noticeably, and you keep the recoil pattern you already know. The same goes for Field Upgrades: Portable Radar suits active hunting, while Trophy System is better on defense.
Once the base classes are comfortable, look at longer goals. The next step is usually prestige, by which point your weapons and attachments will already be unlocked. Seasonal patches keep moving the balance, so re-check how your favorite gun behaves after each update.