In the high-stakes extraction loops of ARC Raiders, managing your ammunition capacity is just as vital as hitting your shots. When you are caught in an intense PvP firefight or trying to suppress a wave of relentless Arc machines, running dry mid-spray means death. That is why the Extended Light Mag II has established itself as an essential, top-tier attachment for anyone running light-ammo weapons.

As an uncommon tier Weapon Mod, this attachment adds +10 rounds to your magazine capacity. While 10 extra bullets might look small on paper, the mathematical reality in live combat completely changes the performance of fast-firing builds.

The Math Behind the Meta: Why +10 Rounds Matters
To understand why players prioritize this mod, you have to look at the raw time-to-kill (TTK) dynamics and damage output per magazine. Light-ammo weapons in ARC Raiders are notorious for their blistering fire rates and relatively small default magazines.

Consider a standard submachine gun like the Hairpin or a fast-firing rifle like the Stitcher. If a weapon fires at 900 rounds per minute (RPM), it burns through 15 rounds per second.

Without the Mod: A standard 20-round magazine empties in a mere 1.33 seconds. If your target is moving quickly or you miss a handful of shots due to recoil, you hit an empty chamber before breaking their shields, forcing a costly 2-to-3-second reload animation.

With the Extended Light Mag II: Boosting that capacity to 30 rounds extends your continuous firing window to 2.0 seconds. That extra 0.67 seconds gives you a 50% increase in sustained fire.

More importantly, it drastically raises your overall damage potential per magazine. If your weapon hits for 18 damage per shot, a standard 20-round magazine caps your maximum potential output at 360 damage. Upgrading to 30 rounds pumps that ceiling up to 540 damage before you ever have to reload. In a game where splitting seconds decides who extracts and who loses their gear, that extra damage threshold lets you comfortably secure a kill and still have enough bullets left to suppress a second pushing enemy.

Weapon Compatibility
The Extended Light Mag II is highly specialized and designed exclusively for a specific roster of light-ammo SMGs and rifles:

Hairpin (SMG)

Kettle (Rifle)

Stitcher (Rifle)

Burletta (Pistol/SMG variant)

Bobcat (PDW)

Equipping it on any of these platforms immediately smoothens out your spray patterns and lets you hold down long, continuous beams during tracking shots.

Blueprint & Crafting Specifications
You cannot simply buy this attachment from low-level vendors on a whim; you have to earn the right to craft it. First, you must secure the permanent fabrication blueprint out in the world. Once you extract and consume it, you can manufacture the mod at your workbench as long as you meet these exact specifications:

Station Requirement: Gunsmith II

Crafting Materials: * 2× Mechanical Components

3× Steel Spring

Workbench Fee: 5,000 Credits

Item Weight: 0.5 kg

Economy Value: If you find yourself swimming in materials, crafted magazines can be liquidated to vendors for 2,000 Credits. Alternatively, high-level players looking for premium setups will buy rare arc raiders blueprints or finished mods through trusted trading hubs like U4N to skip the RNG grind entirely.

How to Find the Blueprint
If you prefer to hunt down the blueprint yourself, prepare for some aggressive scavenging. It shares a competitive loot pool with other uncommon and rare modifications, meaning you need to know exactly where to look.

Target the Right Containers
The blueprint does not drop from heavy military crates. Instead, it is tucked away in civilian infrastructure. You want to prioritize looting residential areas. Scour every house, apartment complex, and abandoned office space for:

Residential drawers

Clothes cupboards

White panel desks and nightstands

These containers are frequently hidden behind locked doors or inside breach rooms that require utility items to pop open, making it worth your time to carry breach charges.

Leverage Map Conditions
RNG can be brutal, but you can artificially tip the scales in your favor. Blueprint drop rates scale up significantly based on the danger level of your session. If you deploy during major, active map events, the container loot tables become significantly more rewarding. Keep an eye out for active sessions featuring:

Hurricanes & Cold Snaps: Environmental hazards that clear out weaker squads but buff container yields.

Locked Gates & Hidden Bunkers: High-tier map events that force dynamic fights but offer the densest concentration of residential and high-value loot containers.

Pack your best survival loadout, clear the area, and systematically strip every drawer to secure this game-changing attachment.