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 | ||
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Joining | Pros and cons | Advanced statistics |
Volga reflex (optical) | ||
Compensator (muzzle) |
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Vertical forearm (under the barrel) |
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Quickdraw Pen (Rear Pen) | ||
target laser (laser) |
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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 | |
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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


PU-21 bldg | ||
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Joining | Pros and cons | Advanced statistics |
Compensator (muzzle) |
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Short barrel (barrel) |
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Bolt (under barrel) |
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Fast Mag I (magazine) |
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Quickdraw Pen (Rear Pen) | ||
Infiltrator Stock (stock) | ||
Steady Laser (Laser) |
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5.45x39mm FMJ (fire mods) |
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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 | |
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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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