Apex Attachments are max-level unlocks that don't touch your five normal Gunsmith slots. Free power, right?

Not quite. Most of them lock other attachment categories or completely change how the gun handles. You're not adding a bonus — you're rebuilding the weapon's identity.

Ask three things before you slot one:

• What does it change?
• What does it cost?
• Will I actually use it mid-gunfight?

Here's every known Apex Attachment, sorted by weapon class.

• Assault Rifles & Battle Rifles
• M4 Hurricane — AR-SMG Hybrid
• Axion Cruiser Kit — Compact Mobility Build
• Kastov 762 Castoff Arc — RF Pulse Barrel
• Hyion Burst K4X — Burst-to-Auto
• Cronen Squall Guided Missile Kit
• SMGs
• PPSh-41 Spitfire Mod — Phosphorus Area Denial
• ISO Nightshade Trace — Post-Hit Tracking
• X58 Phantom — Full Stealth Kit
• WZ55 Strea / PM63 Akimbo Conversion
• Shotgun
• Resi12 Enforcer Kit — Explosive Slug Swap
• Marksman Rifles
• Mosin-Nagant Bayonet Launcher
• Orus 8.6 Six Kunai Module
• Pistols
• Mojave 357 Single-Action Conversion
• 50 GS Auto Attachment
• Full Reference Table
• Build by Playstyle
• FAQ
• What are Apex Attachments?
• Do they take up a normal attachment slot?
• Which Apex Attachment is the strongest right now?
• Best pick for aggressive players?
• Best pick for objective modes?
• Bottom Line

↖ Assault Rifles & Battle Rifles

↖ M4 Hurricane — AR-SMG Hybrid

Rechambers the M4 to a 5.7x28mm-style setup. Lighter recoil, faster ADS, flatter ballistics.

Plays like an SMG with rifle range. Run this if you rush objectives on small-to-medium maps and hate the M4's sluggish sprint-out.

↖ Axion Cruiser Kit — Compact Mobility Build

Unconfirmed name, but it turns the Axion into a stripped-down close-range brawler — integrated stock, side grip, likely no clean ADS behavior.

Blocks multiple slots. Only worth it if you're built for corner-clearing and hipfire chaos. Skip it if you need long lanes.

↖ Kastov 762 Castoff Arc — RF Pulse Barrel

Fires a concentrated RF disruption pulse. Effect on infantry is unconfirmed.

Watch this one closely — biggest wildcard in the whole system.

↖ Hyion Burst K4X — Burst-to-Auto

Fires the standard 3-round burst, then dumps into full-auto if you hold the trigger.

Most practical kit on this list. Front-loads damage, then bails you out if the target survives. Great for players who die between bursts.

↖ Cronen Squall Guided Missile Kit

Underbarrel guided missile, steered post-fire.

Sounds broken, plays risky — you're exposed while guiding it, and Flak-style perks will likely eat the damage. Use it to clear campers and power positions. Don't fire it in an open lane.

↖ SMGs

↖ PPSh-41 Spitfire Mod — Phosphorus Area Denial

Full-auto white phosphorus underbarrel. Not a kill tool — a zone control tool.

Block doorways. Deny Hardpoint entries. Force rotations. Objective players, this is your pick.

↖ ISO Nightshade Trace — Post-Hit Tracking

RFID optic that tracks enemies after you land a hit. Doesn't reveal targets pre-fight.

Weak in a clean 1v1 (the fight's basically over already). Strong for chasing survivors in larger modes or Warzone-style play.

↖ X58 Phantom — Full Stealth Kit

Suppressed fire, no tracers, reduced casing noise, possibly hides teammate death skulls.

Best kit in the entire lineup for flankers. Search and Destroy players will love this — chain kills without broadcasting your position.

↖ WZ55 Strea / PM63 Akimbo Conversion

True dual-wield close-range setup. MW4's no-bloom hipfire system could make akimbo actually consistent for once.

Small maps only. High reward, zero mid-range viability.

↖ Shotgun

↖ Resi12 Enforcer Kit — Explosive Slug Swap

Pump-action cycling plus a side saddle of explosive slugs, swappable mid-fight with standard shells.

Value hinges on swap speed and slug damage at range. If it's fast and hits hard, this fixes the shotgun's biggest weakness — range.

↖ Marksman Rifles

↖ Mosin-Nagant Bayonet Launcher

Silent, recoverable projectile shot plus boosted melee reach/damage.

Gives long-range players a panic button. If it one-shots, it's elite. If it has travel delay, expect a learning curve.

↖ Orus 8.6 Six Kunai Module

Fast-deploy throwing knives, but it eats the underbarrel slot.

High-skill confidence tool. Miss your knife throw, you just gave up recoil control for nothing.

↖ Pistols

↖ Mojave 357 Single-Action Conversion

Converts double-action to single-action: hammer-fan from hipfire, precision reset on ADS.

Removes the pre-fire delay. Snappier panic weapon — but punishes panic-firing hard.

↖ 50 GS Auto Attachment

Full-auto conversion on a .50 AE heavy pistol. Pure volume over precision.

If recoil is manageable, expect this to be the most-used pistol Apex kit in the game.

↖ Full Reference Table

↖ Build by Playstyle

Rule of thumb: if the Apex kit blocks an attachment you build around every match, don't run it just because it's free. A locked barrel or stock can cost more than the perk gives back.

↖ FAQ

↖ What are Apex Attachments?

Unique, weapon-specific upgrades unlocked at max weapon level. They change firing behavior, add special tools, or shift the gun's entire role — beyond what normal attachments can do.

↖ Do they take up a normal attachment slot?

No. They sit outside your five-slot limit. But several of them lock specific categories (barrels, underbarrels, magazines), so it's not always a free upgrade.

↖ Which Apex Attachment is the strongest right now?

X58 Phantom. Suppressed fire, no tracers, quieter casings, possible skull-indicator hiding. It's the cleanest, most repeatable value on this list.

↖ Best pick for aggressive players?

M4 Hurricane, WZ55 Akimbo, and the Axion Cruiser kit. All three trade stability for speed and close-range pressure.

↖ Best pick for objective modes?

PPSh-41 Spitfire Mod. Phosphorus zoning shuts down chokepoints, delays pushes, and clears campers off flags without needing a direct kill.

↖ Bottom Line

Top 5 to grind toward first:

• X58 Phantom — stealth flanking
• M4 Hurricane — AR-SMG hybrid aggression
• Hyion Burst K4X — burst-to-auto reliability
• WZ55 Akimbo — close-range spike damage
• PPSh Spitfire Mod — objective control

Everything else — the missile, the RF pulse, the kunai, the bayonet — is high ceiling, high risk. Great in the right hands, dead weight in the wrong ones.

Treat Apex Attachments as build-defining choices, not free stat boosts. If it fits how you already play, keep it. If it locks you out of gear you rely on, it's a novelty — not a meta pick.