Once Human: How to Unlock and Equip Weapon Accessories

Weapon accessories in Once Human, such as muzzles, optics and magazines, are permanent unlocks. You buy each one once with a material called Precision Components. After that, you can put it on any compatible gun you own. The tricky part is getting the components, because no vendor sells them. They only come from leveling up your blueprint collection.

Quick answer: Raise your Collection Level in the Blueprints menu to earn Precision Components. Then open Gear, right-click a weapon, go to the Accessory tab, and press F to unlock and then equip.

How to unlock a weapon accessory in Once Human

All accessories are handled from one screen, the weapon’s modification window. You don’t need to pick anything up in the world first. If you have enough Precision Components, you can unlock any accessory on the list.

Press K to open your character screen, then switch to the Gear tab. Your equipped firearms and melee weapon appear here, along with their tier and rating.

Right-click the firearm you want to customize to open its modification window. This works on any equipped gun, whether it’s a sniper rifle, an LMG or something else.

Weapon Gear Screen — To start customizing, select a gun on the Gear tab, here the AWS.338 – Bullseye, and right-click it. Shown at 00:14 in HeRo Survival Guides’s video. Image: Starry Studio

The window has three sub-tabs: Mods, Accessory and Cosmetics. Switch from Mods to Accessory. You’ll see four categories, which are Muzzle, Optic, Magazine and Ammo.

Pick a category and hover over a locked accessory. Its card lists the stat bonuses, the weapon classes it fits, and an Unlock Cost in Precision Components.

Accessory Menu Overview — On the Accessory tab, the Muzzle category is open with the Large Brake selected. Its card shows the stats and the Precision Component cost. Shown at 00:30 in HeRo Survival Guides’s video. Image: Starry Studio

If you have enough components, press F to unlock. The cost is deducted, and the button prompt changes from F Unlock to F Equip. That change tells you the unlock worked.

You can press F to preview a locked optic or muzzle on your gun before you spend anything. This lets you see how it looks and compare stats first.

Ammo works differently from the other three slots. You craft it directly instead of unlocking it with Precision Components. Only muzzles, optics and magazines use the unlock system.

How to get Precision Components from Collection Level

The game describes Precision Components as a material used to unlock weapon accessories. Their only source is the Blueprints system. Open the Blueprints tab from the same top bar as Gear, then click Collection Level. This shows a reward track with tiers, and many of those tiers pay out Precision Components.

Blueprint Collection Level — The Collection Level panel is your only source of Precision Components. Each tier you reach adds more to your supply. Shown at 00:56 in HeRo Survival Guides’s video. Image: Starry Studio

You level up your collection by earning Collection EXP. Each level needs more EXP than the last. For example, Level 9 needs 200 EXP to reach the next level. These actions give Collection EXP:

Unlocking new weapon blueprints.
Unlocking new armor blueprints.
Enhancing a blueprint you already own. A single pistol blueprint enhancement gives +24 Blueprint Collection EXP.

Collection Level rewards also include Starchrom. The amount you can earn this way is capped at 15,000 per week. Buying blueprints with Starchrom does not give you Precision Components directly. It only helps by adding to your collection, which moves you toward the next reward tier.

Weapon accessory unlock costs

Prices change from one accessory to the next, so always check the Unlock Cost on the card before you spend. Here are some real costs and stats from the menu:

Accessory	Slot	Key stats	Unlock cost
Large Brake	Muzzle	Bullet Velocity +10%, Accuracy +22%	4 Precision Components
Range Compensator	Muzzle	Stability +16%, Accuracy +15%	4 Precision Components
Tactical Suppressor	Muzzle	Suppressor	4 Precision Components
Baseline Sniper Scope	Optic	Mobility +25%, Aiming Speed +20%, Accuracy +20%	5 Precision Components
Compact Reflex Sight	Optic	2.0x zoom, Mobility +20%, Aiming Speed +20%, Accuracy +5%	4 Precision Components
Tactical Holographic Sight	Optic	2.0x zoom, Mobility +20%, Aiming Speed +20%, Accuracy +5%	4 Precision Components

The Baseline Sniper Scope shows as Iron Sights 1.0x on its card. The Compact Reflex Sight and Tactical Holographic Sight have the same stats, so choosing between them is only about looks. Since each unlock takes several components and every Collection Level takes time to earn, it makes sense to start with an accessory that fits more than one weapon class you use.

How to equip an unlocked accessory on other weapons

An accessory only needs to be unlocked once; afterward, you can fit it to any compatible gun in its class for free. The Large Brake, for instance, works with assault rifles, sniper rifles, and light machine guns. Unlock it while customizing the AWS.338 – Bullseye sniper rifle, and it will also be available for the MG4 – Predator LMG.

To equip it, right-click the second gun on the Gear tab. Open its Accessory tab, choose the right category, select the unlocked accessory, and press F to equip. Pressing U removes every accessory from that weapon at once, and ESC takes you back to the Gear screen.

Equipping Accessories on Other Weapons — After you equip a muzzle you've already unlocked, the attachment appears on the weapon model in the Accessory menu. Shown at 01:19 in HeRo Survival Guides’s video. Image: Starry Studio

To confirm it worked, look at the weapon model in the Accessory menu. The muzzle, optic or magazine should now be attached to the gun, and its stat bonuses are added to the weapon’s numbers. If you leave the menu and come back later, the accessory will still be on the barrel or rail. You can also see the change in the game itself, since a gun with a suppressor looks and sounds different when you aim down sights and fire.