Hey there, fellow survivors! As someone who's spent countless hours navigating the treacherous landscapes of Once Human throughout 2024 and into 2025, I've come to appreciate that our weapons are more than just tools—they're lifelines. While the customization system might not be the labyrinthine puzzle of something like Escape From Tarkov, it's a beautifully streamlined ecosystem where every attachment serves a distinct, vital purpose. Hunting for those perfect Legendary mods to boost accuracy, range, and magazine size is a core part of the endgame grind, but you'd be surprised how many game-changers aren't shrouded in purple or gold rarity. With over 50 accessories to choose from, let me walk you through my personal arsenal of must-haves that have consistently pulled me through the toughest PvE scenarios. Think of building your loadout not as a chore, but as tuning a high-performance engine; each piece is a cog that, when fitted correctly, turns a clunky firearm into a symphony of precision.
15. Small Brake (Muzzle)
This little guy is the unsung hero for your close-quarters workhorses. It's the only non-Legendary on my list that earns its spot, purely because it fills a gap the legendary SMG attachments ignore: meaningful accuracy. Slapping this on your Assault Rifles and SMGs is like giving a scattergun the focus of a laser pointer—it tightens the bullet spread dramatically. Suddenly, those frantic sprays become controlled bursts, allowing you to engage longer-range targets without watching your bullets vanish into the ether. For early to mid-game, this attachment is as essential as a reliable compass in a fog-filled forest.
14. Extended Pistol Mag (Magazine)
Don't sleep on pistols in 2025! Weapons like Jaws and Wildfire have effects that are absolutely pivotal for both crowd control and singling out priority targets. Since Jaws can stagger enemies, turning a dangerous foe into a stumbling punchline, you want to maximize your window of opportunity. An extended mag here is far superior to a quick mag. Why? In the heat of a PvP skirmish or when a boss's adds are swarming you, the last thing you want is the click of an empty chamber. More bullets mean more staggers, more damage, and one less vulnerability to exploit. It's the difference between a popgun and a pocket-sized powerhouse.
13. Extended Brake (Muzzle)
Versatility is king, and the Extended Brake is a monarch for your Shotguns, Assault Rifles, and Light Machine Guns. My philosophy is simple: control the beast, then make it precise. This accessory helps you do both. I prioritize using it to build more accuracy, transforming a wild, bucking recoil pattern into a manageable climb. When you're delving into challenging endgame content like the LEA labs, where targets are often distant and punishing, that extra sliver of precision can be the line between a critical hit and a wasted bullet. Think of it as adding a gyroscope to a spinning top—it just finds its mark more reliably.
12. Tactical Laser Sight (Tactics)
If I had to choose one attachment to take to a deserted island (populated by Deviants, of course), this might be it. My most-used mod across Shotguns, SMGs, ARs, Snipers, and LMGs. The raw +19 accuracy it grants creates a very narrow bullet spread, which feels like swapping a garden hose for a needle. This is your best friend for landing consistent critical headshots. Coupled with a boost to aiming speed, it lets you snap into first-person view and land crucial shots in PvP and PvE fights before your opponent even finishes their animation. It's so effective it feels like having a tiny, hyper-competent targeting drone living on your rail.
11. Tactical Holographic Sight (Optic)
Can't decide if you want speed, stability, or zoom? The Tactical Holographic Sight is your all-in-one, well-balanced accessory. Perfect for Shotguns, SMGs, Assault Rifles, and LMGs when you're in the experimental phase or need a reliable generalist. It offers a comforting blend of Zoom level, Aiming Speed, Mobility, and Stability—a little taste of everything. It’s the culinary equivalent of a perfectly seasoned stock that forms the base for any great dish. It won't max out any single stat, but it will never let you down, serving as the perfect pitstop on your journey to a specialized build.
10. Tactical Rifle Scope (Optic)
Now, this is an interesting one. While it can be used on long-range weapons, its true calling is on close-combat tools like Shotguns and SMGs. Equipping this for close-quarter encounters gives you a slight visual edge without the tunnel vision of a high-magnification scope. The ergonomics are wonderfully compact, letting you maintain situational awareness. Aiming down sights with this on a rapid-fire weapon allows you to surgically shred enemies to pieces, turning a chaotic room-clear into a methodical dissection. It makes your shotgun feel less like a booming bell and more like a precise, repeating stamp.
9. Precision Rifle Scope (Optic)
Designed for close-to-mid-range work on Assault Rifles, Sniper Rifles, and Light Machine Guns, this scope demands respect. The key here is that you absolutely must maintain recoil control if you're using it on automatic weapons. Otherwise, your second shot might as well be aimed at the moon. The visual recoil in first-person can be heavy, so a conscious drag downward is mandatory. My strong advice? This scope sings when paired with a Sniper Rifle. On an automatic weapon, it can feel like trying to read a novel on a rollercoaster—possible, but needlessly difficult. On a bolt-action, it's a marriage made in heaven.
8. Extended Rifle Mag (Magazine)
This is almost a universal law in my loadouts: more ammunition increases your overall DPS. Period. While magazines that decrease reload time sound nice on paper, they rarely outweigh the benefit of having 30-50% more bullets in the chamber. In sustained fights against tanky elites or during horde events, that extra capacity means less downtime and more lead in the air. You can use faster reload mags as stopgaps if you lack legendary options, but your default should always lean towards extension. It's the most straightforward way to boost your weapon's endurance, like giving a marathon runner a second wind on tap.
7. Large Brake (Muzzle)
When you're ready to specialize and truly max out your weapon's potential, the Large Brake steps onto the stage. For Assault Rifles, Sniper Rifles, and Light Machine Guns, this accessory provides the highest accuracy boost among muzzle devices. In long-range duels or when picking off weak spots on a colossal Deviant, this is your best friend. It lets you hold your aim steady on a pixel-sized critical zone and trust that every bullet will fly true. It transforms your rifle from a tool into a precision instrument, as dependable and focused as a master watchmaker's loupe.
6. Large LMG Drum Mag (Magazine)
Ah, the LMG—the weapon of suppression and sustained fire. With the right seasonal calibrations (Overflow style, I'm looking at you in 2025), this drum can balloon your capacity to 200 rounds or more. While faster reload speed for an LMG seems logical, in practice, it's often a trap. Having a bottomless well of bullets is almost always better than shaving a few seconds off the reload animation. However, a word of caution: LMGs have a naturally high bullet spread. I advise pairing this massive mag with an accessory that gives you more accuracy, like the Large Brake or Tactical Laser Sight. Without it, you're condemned to close-to-mid-range mayhem, which, while fun, isn't always optimal. This drum mag is the heart of your bullet-hose build, but it needs a brain to guide the torrent.
Building your weapon in Once Human is a deeply personal journey. These fifteen attachments form the reliable core of my philosophy: prioritize control, sustain, and then specialize. They've been my companions through countless raids and boss fights in 2025. Remember, the right attachment doesn't just change your stats; it changes how you play, how you approach a fight, and ultimately, how you survive. Now get out there, start farming, and tune your weapons into instruments of salvation... or annihilation. Whichever you prefer!