The best PU-21 builds in Black Ops 6

Call of Duty: Black Ops 6 has three LMGs available for launch. The PU-21 is the first one you unlock and possibly one of the best, featuring some unique mounting combinations that turn it into an AR/LMG hybrid. If you liked the Hades LMG from Black Ops 4, or the similar MW3 underbarrel mount, the PU-21 is for you.

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In this guide, we'll look at two builds of the PU-21 that make it a great LMG for most situations. The first build is tailored for an anchor playstyle for core multiplayer, while the second build is tuned for aggressive gameplay.

The durability of the PU-21 assembly

PU-21 bldg
Joining Pros and cons Advanced statistics
Volga reflex (optical)
Compensator (muzzle)
  • -26% Shotgun recoil
  • -30% vertical recoil control
Vertical forearm (under the barrel)
  • + Horizontal recoil control
  • -2% Shotgun recoil
  • -35% horizontal recoil control
Quickdraw Pen (Rear Pen)
target laser (laser)
  • + Idle swing delay when aiming
  • + Stability when walking
  • Visible laser in ADS

The PU-21 is incredibly strong if you can get all your shots in, but this gun has some serious recoil and idle issues that we need to address first. We strongly advise you to use a Target laser with this LMG. This will delay the ADS sensed by your weapon for three seconds, making it much easier to get a kill over 20 meters.

In terms of accuracy, we use a Compensator to reduce vertical recoil and a Vertical forearm to reduce all horizontal deviations. This makes the PU-21 surprisingly accurate for LMGs, but you'll want to throw optics of your choice to clean up the gun's bulky ADS profile. For our fifth slot, use Quickdraw Grip to greatly reduce the weapon's ADS speed. You won't compete with SMGs or even some ARs, but you'll dominate mid-range fights if you get into position.

Download recommendations

benefits
Specialty Strategist
Column one Bulletproof vest, Tac mask
The second column Dispatcher
The third column Bankroll
Equipment
A wildcard Perk Greed
Deadly An advantage
Tactical Steam
Field update Trophy system

Such a fixed style of play is perfectly combined with Strategist specialtygiving you a bonus point for playing near the objective and destroying enemy equipment. To trigger this perk, we use Perk Greed to run Body armor and Yes Mask at the same time. Enemy equipment now has little effect on you. Then we use Dispatcher to make Scorestreaks support cheaper. Throw Bankroll for some initial points and you can connect UAVs and HARPs with ease.

In terms of hardware, our only hard recommendation is this Trophy system for your Field Upgrade. This will intercept all incoming enemy equipment, making it much easier to lock down hardpoints, dominance flags, and other important objectives in multiplayer.

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Gunfighter PU-21 Build

Black Ops 6 PU-21 Gunfighter Build
Detailed stats for the Black Ops 6 PU-21 Gunfighter build
PU-21 bldg
Joining Pros and cons Advanced statistics
Compensator (muzzle)
  • -26% Shotgun recoil
  • -30% vertical recoil control
Short barrel (barrel)
  • Jumping ADS Speed
  • Jumping Sprint to the speed of fire
  • Removes air penalties for ADS and sprint to fire.
Bolt (under barrel)
  • ADS bolt
  • + ADS speed
  • + Aim for walking speed
  • Can't fully ADS
  • -22% ADS speed
  • -20% Aimed walking speed
Fast Mag I (magazine)
  • + Reboot speed
  • + ADS speed
  • +Sprint to fire rate
  • Magazine for 45 cartridges
  • +42% to cooldown speed
  • -6% ADS speed
  • -4% Sprint to Fire Rate
Quickdraw Pen (Rear Pen)
Infiltrator Stock (stock)
Steady Laser (Laser)
  • + Distribution of Hipfire
  • The laser is visible in the thigh area
5.45x39mm FMJ (fire mods)
  • + Damage Scorestreak
  • + Bullet penetration

This build also works well in Zombies.

If you're missing Hades from BO4, this build might be for you. We use unique A small piece of paper an underbarrel mount to change the PU-21's ADS mode to focused headfire mode, making this weapon much more nimble to aim. Unlike the fixtures it's based on, Crossbar ADS does just that no is considered hipfiring, so it is not affected by hipfire modifiers. We still recommend that you use a Stable aiming laser as hipfiring can be useful in panic situations, but it doesn't affect Crossbar mode at all.

Accuracy is paramount here, so you'll want to use a Compensator muzzle to reduce the high vertical recoil of the weapon. For better processing, we strongly recommend Quick Mags I. This turns the PU-21 into a magazine fed LMG that can reload much faster than normal and even increases your ADS speed. Throw on Quickdraw Grip for faster ADS speed and you're only slightly behind most assault rifles.

To finish the assembly, we use Infiltrator stock to greatly improve our ADS rate of fire. This combines with the Crossbar attachment to greatly improve your shotgun speed, putting it roughly on par with the SMG. Throw it on FMJ and a Short barrel complete construction.

Download recommendations

benefits
Specialty Law enforcement officer
Column one Agility
The second column A killer
The third column Double time
Equipment
A wildcard Shooter
Deadly An advantage
Tactical Steam
Field update Trophy system

You will want to use The specialty of the security guard for this build. Kills will cause HP to regenerate after a short delay and greatly improve your movement speed for a few seconds. To run this bonus, we use Agility reduce weapon movement, A killer for free points against MVP, and Double time for longer uptime in a tactical sprint. Your choice of equipment comes down to preference.

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