Call of Duty: Black Ops 6 has three LMGs available to use for launch. The PU-21 is the first one you'll unlock and is arguably one of the best, featuring some unique attachment combinations that morph it into an AR/LMG hybrid. If you loved the Hades LMG from Black Ops 4 or MW3's similar underbarrel attachment, the PU-21 is right up your alley.

In this guide, we'll be covering two builds for the PU-21 that turn it into an excellent LMG for most situations. The first build is tailored for an anchor-heavy playstyle for core multiplayer, while the second build is tuned for aggressive gameplay.

Accuracy PU-21 Build

PU-21 Build
Attachment	Pros And Cons	Advanced Stats
Volzhskiy Reflex (Optic)	Precision Sight Picture	N/A
Compensator (Muzzle)	Vertical Recoil Control	-26% Recoil Gun Kick -30% Vertical Recoil Control
Vertical Foregrip (Underbarrel)	Horizontal Recoil Control	-2% Recoil Gun Kick -35% Horizontal Recoil Control
Quickdraw Grip (Rear Grip)	Aim Down Sights Speed	-22% ADS Speed
Target Laser (Laser)	Aiming Idle Sway Delay Aim Walking Steadiness Laser Visible in ADS	3,350 ms ADS sway delay

The PU-21 is incredibly strong if you can land all of your shots, but this weapon has some serious recoil and idle sway issues we need to address first. We highly recommend you use a Target Laser with this LMG. It'll delay the ADS sway your gun experiences for three seconds, making it much easier to land kills past 20 meters.

As for accuracy, we use a Compensator for vertical recoil reduction and a Vertical Foregrip to reduce all horizontal deviation. This makes the PU-21 surprisingly accurate for an LMG, but you'll want to throw on an optic of your choosing to clean up the gun's bulky ADS profile. For our fifth slot, use Quickdraw Grip to greatly cut down on the weapon's ADS speed. You won't compete with SMGs or even certain ARs, but you'll dominate in mid-range duels once you're in position.

Loadout Recommendations

Perks
Perks Specialty Strategist Column One Flak Jacket, Tac Mask Column Two Dispatcher Column Three Bankroll Equipment Wildcard Perk Greed Lethal Preference Tactical Stim Field Upgrade Trophy System Specialty	Strategist
Column One	Flak Jacket, Tac Mask
Column Two	Dispatcher
Column Three	Bankroll
Equipment
Wildcard	Perk Greed
Lethal	Preference
Tactical	Stim
Field Upgrade	Trophy System

An anchored playstyle like this excels with the Strategist specialty, granting you bonus score for playing near the objective and destroying enemy equipment. To trigger this set bonus, we use Perk Greed to run Flak Jacket and Tac Mask simultaneously. Enemy equipment now has little effect on you. We then use Dispatcher to make support Scorestreaks cheaper. Throw on Bankroll for some starting score, and you can chain UAVs and HARPs with ease.

As for equipment, our only hard recommendation is the Trophy System for your Field Upgrade. This will intercept all incoming enemy equipment, making it much easier to lock down Hardpoints, Domination flags, and other important objectives in multiplayer.

Gunfighter PU-21 Build

PU-21 Build
Attachment	Pros And Cons	Advanced Stats
Compensator (Muzzle)	Vertical Recoil Control	-26% Recoil Gun Kick -30% Vertical Recoil Control
Short Barrel (Barrel)	Jumping ADS Speed Jumping Sprint to Fire Speed	Removes midair penalties for ADS and sprint to fire.
Crossbar (Underbarrel)	Crossbar ADS ADS Speed Aim Walking Speed	Cannot fully ADS -22% ADS Speed -20% Aim Walking Speed
Fast Mag I (Magazine)	Reload Quickness ADS Speed Sprint to Fire Speed	45-Round Magazine 42% Reload Speed -6% ADS Speed -4% Sprint to Fire Speed
Quickdraw Grip (Rear Grip)	Aim Down Sights Speed	-26% ADS Speed
Infiltrator Stock (Stock)	Aim Walking Speed	17% ADS Strafe Speed
Steady Aim Laser (Laser)	Hipfire Spread Laser Visible in Hip	-30% Hipfire Spread
5.45x39mm FMJ (Fire Mods)	Scorestreak Damage Bullet Penetration Damage	N/A

This build also works well in Zombies.

If you miss the Hades from BO4, this build might be for you. We use the unique Crossbar underbarrel attachment to replace the PU-21's ADS mode with a focused hipfire mode, making this weapon much more nimble while aiming. Unlike the attachment it's inspired by, Crossbar ADS does not count as hipfiring, so it's not affected by hipfire modifiers. We still recommend you use a Steady Aim Laser since hipfiring can be useful in panic situations, but it doesn't affect the Crossbar mode at all.

Accuracy is paramount here, so you'll want to use a Compensator muzzle to cut down on the weapon's high vertical RECOIL. For better handling, we highly recommend Fast Mags I. This turns the PU-21 into a magazine-fed LMG that can reload significantly faster than usual, and it even buffs your ADS speed. Throw on the Quickdraw Grip for more ADS speed, and you are only slightly behind most assault rifles.

To finish the build, we use the Infiltrator Stock to greatly improve our ADS strafe speed. This stacks with the Crossbar attachment to significantly improve your strafe speed, making it roughly on par with SMGs. Throw on FMJ and a Short Barrel to complete the build.

Loadout Recommendations

Perks
Specialty	Enforcer
Column One	Dexterity
Column Two	Assassin
Column Three	Double Time
Equipment
Wildcard	Gunfighter
Lethal	Preference
Tactical	Stim
Field Upgrade	Trophy System

You'll want to use an Enforcer specialty for this build. Kills will trigger HP regeneration after a short delay and greatly improve your movement speed for a few seconds. To trigger this bonus, we use Dexterity to reduce weapon motion, Assassin for free points against MVPs, and Double Time for more tactical sprint uptime. Your choice of equipment boils down to preference.

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