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Gears of War: E-Day Weapon Parts Farming and Mods Guide

Learn how to farm Weapon Parts in Gears of War: E-Day and unlock powerful Weapon Mods. Discover the best Horde Siege farming methods, Weapon Part Stockpiles, Secondary Objectives, extraction strategies, and upgrades worth prioritizing.

October 10, 202623 min read

What Are Weapon Parts in Gears of War: E-Day?

Weapon Parts are a progression resource used to purchase unlocked Weapon Mods in Horde Siege.

These modifications allow players to customize their firearms, improve performance, and sometimes significantly change how a weapon functions.

Unlike temporary mission equipment, purchased Weapon Mods contribute to your long-term Horde Siege customization.

That makes Weapon Parts especially valuable for players who want to improve their preferred weapons.

However, there are two important requirements.

First, the Weapon Mod must become available through class progression.

Second, you must purchase it with Weapon Parts before equipping it.

Having enough Weapon Parts does not automatically unlock every modification.

If the mod remains locked behind a class level, you need to advance the relevant class before purchasing it.

Weapon Parts vs. Energy – What's the Difference?

Horde Siege features several resources, but Weapon Parts and Energy are not interchangeable.

Understanding the difference prevents unnecessary confusion.

  • Weapon Parts – Permanent Weapon Mod purchases.

    Weapon Parts allow you to purchase modifications after unlocking them through class progression. These upgrades support your long-term weapon customization, making Parts especially valuable when building equipment used across multiple classes.

  • Energy – Equipment and upgrades during a mission.

    Energy is collected into a shared squad pool and used at Supply Caches or defensive positions to purchase weapons, equipment, turret upgrades, and Squad Perks. It helps your squad survive the current mission.

  • Class XP – Progression unlocks.

    Class XP advances your selected Horde Siege class. As your class gains levels, additional weapons, equipment, and modification options become available.

  • Squad Perks – Temporary mission bonuses.

    Squad Perks provide benefits during a mission but expire when the mission ends. They do not replace permanent Weapon Mod purchases.

The key distinction is that Weapon Parts help unlock permanent weapon improvements, while Energy primarily supports your squad's immediate survival.

Collecting large amounts of Energy doesn't mean you've earned the same amount of Weapon Parts.

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How to Get Weapon Parts in Gears of War: E-Day

The Coalition confirms several ways to obtain Weapon Parts.

Some are tied to progression, while others require completing optional activities and surviving Horde Siege missions.

The main sources are:

  • Class progression rewards

  • Secondary Objectives

  • Weapon Part Stockpiles

  • Rewards from qualifying Horde Siege encounters and activities

The most efficient farming strategy combines useful opportunities with reliable mission completion.

1. Earn Weapon Parts Through Class Progression

As you complete Horde Siege missions, your selected class earns Class XP.

Every launch class has 30 progression levels.

Advancing through these levels unlocks additional equipment and customization options, and some progression rewards include Weapon Parts.

This provides a straightforward way to earn Parts while improving your character.

However, class progression alone isn't necessarily the fastest way to obtain a large Weapon Parts balance.

The Coalition specifically identifies collecting and successfully extracting with Weapon Parts from Horde Siege missions as the best general approach.

Best approach: Treat progression rewards as useful additional income while actively pursuing appropriate Weapon Parts opportunities during missions.

2. Complete Secondary Objectives

Secondary Objectives are one of the most important sources of additional rewards in Horde Siege.

These optional tasks appear across the battlefield while your squad works toward its main mission.

Completing them can provide Weapon Parts, free equipment, and temporary Squad Perks.

Confirmed Secondary Objective activities include:

  • Defusing Locust explosives

  • Eliminating High Value Targets

  • Collecting COG intel

  • Delivering Power Cores to another squad's R.I.G.

Each activity creates a different risk-and-reward situation.

A nearby objective that your squad can finish safely may be an excellent opportunity.

A difficult target surrounded by powerful enemies may not justify the additional risk.

The goal isn't completing every Secondary Objective. It's choosing the ones that improve your rewards without threatening extraction.

3. Find Weapon Part Stockpiles

Weapon Part Stockpiles are dedicated reward opportunities found through Horde Siege's COG Resupply system.

They can provide valuable quantities of Weapon Parts.

However, Stockpiles are not ordinary pickups.

The Coalition confirms that obtaining their rewards requires coordination with other squads.

This is especially important because Horde Siege places three squads on the same battlefield.

You may need assistance from players outside your immediate four-person team to get the most value from a Stockpile.

Additionally, COG Resupplies attract Locust forces.

That means approaching a Stockpile can trigger additional danger.

Never assume that a free reward is automatically safe.

4. Participate in Invasion Events

Invasion Events introduce powerful Locust threats that can affect every squad on the map.

Examples include the Corpser and Brumak.

Squads participating in these encounters can receive a share of the event rewards.

This makes Invasion Events another potential source of Weapon Parts.

However, they are significantly more dangerous than many ordinary activities.

Large bosses arrive with supporting enemies, and their associated modifiers can disrupt the battlefield.

Some modifiers can temporarily block extraction or disable Supply Caches.

There's another important detail: The Coalition reduced Weapon Parts rewards for Invasion participation during launch balancing.

As a result, older beta farming numbers should not be treated as reliable current payouts.

Only participate when your squad is equipped to survive and the potential reward justifies the encounter.

Best Weapon Parts Farming Methods

Not every Horde Siege activity offers the same farming value.

The strongest approach depends on your class progression, team composition, difficulty, and ability to extract successfully.

Here are the methods we recommend prioritizing.

Method 1 – Farm Secondary Objectives in Siege

Best for: Players who want to combine Weapon Parts farming with useful mission progression.

Standard Siege missions contain multiple objectives and opportunities to move across the battlefield.

This gives your squad more opportunities to encounter optional activities and collect additional rewards.

A practical approach is to complete worthwhile Secondary Objectives while progressing toward the main mission.

Here's how to make it work:

  • Check which Secondary Objectives are nearby.

    Don't run across the entire battlefield for a reward when another useful objective is already close to your current position. Travel distance matters because additional exposure can increase the risk of losing Squad Lives.

  • Prioritize objectives your team can complete efficiently.

    If your squad has suitable explosive equipment, an explosive-related objective may be easier than a difficult High Value Target encounter. Choose activities that match your current equipment.

  • Collect the reward before moving on.

    Pay attention to the objective completion notification and rewards. Don't assume an activity has been completed simply because the surrounding enemies were defeated.

  • Continue the main mission once the detour stops being worthwhile.

    Secondary Objectives support progression, but they shouldn't become a reason to abandon the mission's actual completion conditions.

This method is especially attractive for coordinated squads that can make quick decisions about optional encounters.

However, there is no verified universal Parts-per-hour ranking proving Siege is always the fastest playlist.

Treat it as a strong farming option rather than a guaranteed best method.

Method 2 – Target Weapon Part Stockpiles

Best for: Coordinated squads willing to work with other teams.

Weapon Part Stockpiles are among the most obvious targets because their rewards directly support weapon customization.

However, maximizing their value involves more than approaching the marker and immediately interacting.

Recent community reports suggest that certain Stockpile objectives feature a reward rarity that improves while players remain within the designated zone.

Players have also reported that bringing more squad members and cooperating with other teams can improve the reward.

One particularly useful clarification from community discussions concerns counters such as 1/12.

Players report that this counter reflects the number of players participating in the Stockpile area rather than the number of Weapon Parts awarded.

These observations are based on post-launch player testing, not a complete official explanation of the reward formula.

How to approach Stockpiles effectively:

  • Identify the correct COG Resupply type.

    Not every resupply contains Weapon Parts. Confirm that you're approaching a Weapon Part Stockpile rather than a Supply Drop or Perk Cache.

  • Bring teammates when possible.

    Since Stockpiles are designed around cooperation, coordinating with nearby players can improve your ability to defend the position and may affect the resulting reward.

  • Watch the objective's rarity or progress indicator.

    Community testing suggests that prematurely completing certain Stockpile interactions may reduce their potential value. Read the instructions displayed by the game before claiming a reward.

  • Protect the Stockpile area.

    COG Resupplies attract Locust. Establish useful firing positions instead of allowing every player to become vulnerable during the objective.

  • Avoid sacrificing the mission for a larger payout.

    Even a valuable Stockpile becomes worthless as a farming opportunity if your entire squad fails before extraction.

The exact maximum payout and scaling formula have not been reliably established.

Do not assume any fixed number of Parts is guaranteed.

Method 3 – Use Blitz for Shorter Farming Attempts

Best for: Players who prefer shorter missions and straightforward extraction attempts.

Blitz features one or two main objectives.

This makes it an attractive option for players who want to complete missions without committing to a longer Siege or Horde encounter.

A shorter mission structure can help when your squad is still learning.

However, Blitz doesn't automatically contain the same number of optional reward opportunities as longer missions.

That creates a tradeoff.

You may finish missions more quickly, but your total Weapon Parts per successful extraction could be lower.

To determine whether Blitz is worthwhile, compare your actual retained Parts against the effort required.

Choose Blitz when reliable completion matters more than maximizing the rewards from one long mission.

Method 4 – Join Manageable Invasion Events

Best for: Experienced squads capable of cooperating against dangerous bosses.

Invasion Events can provide additional rewards, but they should not be treated as risk-free farming opportunities.

The Coalition reduced Invasion Weapon Part rewards and increased Invasion difficulty ahead of the full launch.

This makes boss farming less straightforward than older beta videos might suggest.

Before committing, consider:

  • Can your squad contribute meaningful damage?

    If your equipment is struggling against ordinary enemies, a major boss may be an unreasonable risk.

  • Are other squads available to help?

    Invasion Events are designed to encourage cooperation. Multiple squads can distribute the combat pressure more effectively.

  • Does the active modifier affect extraction?

    If extraction is blocked, resolving the event may become necessary to complete your mission.

  • Do you have enough resources?

    Running out of ammunition or defensive equipment during a boss encounter can quickly threaten the entire run.

The best Invasion strategy is to participate when your squad can survive, not to force every boss encounter for a speculative payout.

Which Horde Siege Playlist Is Best for Weapon Parts?

Blitz, Siege, and Horde all offer different advantages.

The best choice depends on whether you prioritize shorter completions, optional encounters, or longer defensive missions.

Blitz – Lower Commitment, Fewer Main Objectives

Blitz is useful when you want a simpler mission structure.

It features one or two primary objectives and generally requires less mandatory content than the other playlists.

However, shorter missions may offer fewer opportunities to gather bonus rewards.

Choose Blitz when your squad can extract reliably and wants to prioritize consistency.

Siege – Strong Balance of Objectives and Rewards

Siege provides more opportunities to encounter Secondary Objectives and battlefield activities.

For players specifically seeking Weapon Parts, this makes it an appealing starting point.

You can pursue optional rewards while advancing the main mission.

However, extra detours increase exposure to enemy attacks.

Choose Siege when your squad can handle the additional movement and combat.

Horde – Extended Defensive Farming

Horde focuses on surviving 10 waves while defending a single R.I.G.

The longer defensive structure can create opportunities for additional encounters and resource collection.

However, its length also increases the potential cost of failing late in the mission.

Some community players report strong results from Horde, while others obtain better payouts from Siege.

These experiences vary because optional events, difficulty, participation, and successful extraction affect the final reward.

There is no sufficiently verified universal farming comparison that establishes one playlist as the highest Weapon Parts per hour.

For most players, we recommend testing Siege first, then comparing its results against Blitz and Horde.

How Difficulty Affects Weapon Parts Farming

Higher Horde Siege difficulties offer increased rewards.

That sounds appealing for farming, but there's a significant disadvantage.

Harder missions increase the chance that your squad fails before extraction.

Since Weapon Parts collected during a mission depend on successful completion, a higher potential reward doesn't always translate into better progression.

Infantry – A Sensible Intermediate Challenge

Infantry is officially recommended for classes between levels 10 and 20.

It offers a more demanding experience for players with some progression and useful equipment.

Consider Infantry when your squad can reliably complete lower-difficulty missions.

Avoid increasing difficulty if your class lacks important upgrades or your team frequently loses Squad Lives.

Commander – Better Suited to Advanced Classes

Commander is recommended for class levels 20 through 30.

It is intended for players with more advanced class progression and stronger combat capabilities.

However, launch tuning increased Commander difficulty.

That means farming approaches developed during the beta may be less reliable.

Choose Commander when your team can consistently survive difficult objectives and extraction encounters.

Allfather – High Risk for Farming

Allfather is recommended for maximum-level classes.

It is one of the most demanding Horde Siege challenges.

For players who are still developing their classes, Allfather is generally an inefficient place to gamble on Weapon Parts.

Even experienced teams should compare the actual rewards against the risk of failure.

The best farming difficulty is the one that provides worthwhile rewards while allowing your squad to extract consistently.

How to Keep Weapon Parts After Every Mission

Collecting Weapon Parts does not immediately secure them.

The Coalition confirms that your squad must successfully extract to keep Weapon Parts collected during the mission.

At least one member of your own squad must escape aboard the Raven.

This requirement makes extraction one of the most important parts of farming.

Prepare Before the Extraction Phase

Once the main objectives are complete, your squad must clear the landing zone and survive until the Raven arrives.

Don't enter this encounter with an exhausted supply of ammunition and no useful defensive equipment if you can prepare beforehand.

If you're carrying valuable Weapon Parts, prioritize maintaining a safe route to extraction.

Keep Your Squad Together

Splitting up immediately before extraction creates unnecessary danger.

A player who becomes isolated may be difficult to revive.

That can force the remaining team to risk additional lives.

Maintain supporting distance and cover important enemy approaches.

Protect the Final Survivor

If several teammates are eliminated, the remaining player becomes extremely important.

Remember that only one squad member needs to extract successfully.

When necessary, the final survivor should focus on reaching the Raven rather than pursuing additional enemies.

One successful extraction protects the collected Parts. A complete squad failure loses the mission's unbanked Parts.

Know When to Stop Farming

This is one of the most important decisions.

As your collection of unbanked Parts grows, pursuing another optional objective becomes increasingly risky.

Before taking another detour, ask whether your team has enough ammunition, survivability, and time to finish it safely.

If the answer is uncertain, completing the mission may be more valuable.

How Weapon Mods Work in Gears of War: E-Day

Weapon Mods allow players to customize individual firearms.

Some upgrades improve familiar characteristics such as accuracy or magazine capacity.

Others introduce significant functional changes.

For example, the Gnasher can receive a bayonet modification.

This gives players more freedom to create weapons that suit particular combat roles.

However, the way you obtain Weapon Mods differs between Horde Siege and Campaign.

Weapon Mods in Horde Siege

In Horde Siege, modifications are tied to class progression.

To use a mod:

  1. Advance the appropriate class until the modification becomes available.

  2. Obtain enough Weapon Parts.

  3. Purchase the unlocked Weapon Mod.

  4. Equip it in your weapon customization setup.

  5. Use the modified weapon during Horde Siege missions.

The important distinction is that unlocking and purchasing are separate requirements.

A modification can be visible on your class progression track without being available for immediate use.

Weapon Mods in Campaign

Campaign has its own exploration-based customization process.

Players can discover modifications and additional mod slots through yellow Hard Cases and Secondary Objectives.

Unlocked modifications are equipped at Supply Caches.

Campaign modification pickups should not be confused with the repeatable Horde Siege Weapon Parts farming economy.

Searching campaign Hard Cases is useful for campaign customization, but it is not a confirmed method of repeatedly generating the Horde Siege Weapon Parts resource.

Weapon Mods in Versus

Versus does not use Weapon Mods.

Players begin competitive matches with standardized equipment, and weapon customization does not provide an attachment advantage.

If your only goal is improving Versus performance, farming Weapon Parts won't provide stronger PvP starting weapons.

Weapon Mods are primarily relevant to Campaign and Horde Siege.

Best Weapon Mods to Prioritize First

Not every modification deserves an immediate purchase.

The smartest strategy is to improve weapons that you already use frequently.

A reliable attachment that improves every mission is generally more valuable than a specialized modification for a weapon you rarely equip.

Here are our recommended upgrade priorities.

Prototype Lancer – Best General-Purpose Mod Investment

The Prototype Lancer is one of the strongest candidates for early Weapon Mod investment.

It supports versatile mid-range combat and can fit multiple class builds.

Useful modifications include:

  • Cover Brace

    Improves accuracy when firing from cover. This is a particularly attractive choice for players who spend most engagements behind defensive positions.

  • Precision Rifling

    Improves critical damage and accuracy. It is useful when you consistently target vulnerable areas rather than relying exclusively on sustained body shots.

  • Active Compensator

    Improves accuracy during sustained fire. Consider it if your biggest problem is maintaining consistent hits while firing longer bursts.

  • Huge Magazine

    Greatly increases ammunition capacity but introduces slower aiming and reloading. This can be valuable in prolonged engagements, although the handling penalties must be considered.

  • Skeleton Frame

    Improves aiming, weapon swapping, and movement while aiming. It is attractive for players who value responsiveness over maximum magazine capacity.

Our recommendation: Prioritize Cover Brace or Precision Rifling when your role emphasizes accurate rifle fire.

If sustained-fire control is your main weakness, consider Active Compensator instead.

These modifications serve different purposes, so the best choice depends on how you actually use the gun.

Gnasher – Best Close-Range Utility Mods

The Gnasher rewards aggressive players who understand positioning.

Several modifications help improve its reliability or change its close-range utility.

Recommended options include:

  • Slick Breech

    Greatly improves reload speed. This is especially attractive for players who frequently enter consecutive close-range fights.

  • Auto-Pouch

    Automatically reloads the weapon after it has been stowed briefly. It can make switching between a rifle and shotgun more convenient.

  • Bayonet

    Adds quick melee attacks and a bayonet charge. This significantly changes the weapon's available close-range options.

  • Skeleton Frame

    Improves aiming and swapping responsiveness, making it appealing for players who regularly alternate weapons.

Our recommendation: Prioritize reload reliability before purchasing specialized melee modifications.

Slick Breech and Auto-Pouch provide practical advantages for players who use the Gnasher frequently.

The Bayonet is worth considering when you specifically want a more aggressive melee-oriented playstyle.

Lancer Mk1 – Best Mods for Recoil Control

The Lancer Mk1 is powerful but demands attention to recoil.

Modifications that improve handling can make the weapon significantly more comfortable.

Useful options include:

  • Cover Brace: Supports accurate fire from protected positions.

  • Extended Magazine: Increases ammunition capacity, helping during prolonged engagements.

  • Precision Rifling: Improves accuracy and critical damage.

  • Semi Auto: Changes the weapon's firing behavior toward controlled, accurate shots.

For players struggling with recoil, handling improvements can provide more practical value than upgrades that simply emphasize damage.

The goal is connecting more shots consistently.

Hammerburst – Best Mods for Controlled Fire

The Hammerburst excels when players maintain accurate burst-fire engagements.

Useful modifications include Holo Sight, Mobile Stabilizer, and magazine-related upgrades.

These support different approaches.

Holo Sight improves aiming flexibility, while Mobile Stabilizer helps with accuracy during movement.

Magazine upgrades may improve sustained combat but can introduce tradeoffs.

Prioritize the weakness that actually affects your performance.

Longshot – Best Precision Mod Investment

The Longshot is ideal for players who prefer accurate shots against dangerous targets.

For Campaign, documented upgrades include Skeleton Frame and Forged Barrel.

Skeleton Frame helps with handling, while Forged Barrel supports weapon accuracy and useful engagement range.

For Horde Siege, prioritize precision modifications available through your current class progression.

Don't assume every Campaign pickup uses the same unlock path or is immediately available to your Horde Siege character.

A precision upgrade only provides value when you can consistently land the shots it supports.

How to Spend Weapon Parts Without Wasting Them

Weapon Parts are most valuable when spent deliberately.

You don't need to purchase every modification immediately.

Instead, build around the equipment you use most often.

Prioritize Your Most-Used Weapon

Start with the firearm that appears in your normal loadout.

If you regularly use the Prototype Lancer, improving it is likely to provide more practical value than modifying a specialist weapon you rarely equip.

A frequently used weapon offers more opportunities to benefit from your investment.

Take Advantage of Cross-Class Customization

One of Horde Siege's most valuable mechanics is shared weapon customization.

The Coalition confirms that modifications purchased for a weapon are shared across classes that use that weapon.

For example, modifying a Prototype Lancer while playing Assault means those same modifications remain associated with the weapon when another class equips it.

This creates excellent long-term value.

Weapon Mods are tied to the weapon, not permanently restricted to the class that originally purchased them.

However, a class must still have access to that weapon.

Shared customization doesn't automatically grant every class access to every gun.

Avoid Purchasing Mods Based Only on Damage

A higher damage value doesn't automatically mean better real-world performance.

A weapon with excessive recoil or slow handling can become less effective even if its theoretical damage improves.

Consider accuracy, reload behavior, ammunition capacity, and mobility.

The strongest upgrade is often the one that solves your most frequent combat problem.

Save Parts for Important Unlocks

If you're close to unlocking a modification that will significantly improve your preferred weapon, consider saving your balance.

Spending resources on minor upgrades can delay more valuable purchases.

However, there's no reason to save indefinitely when a currently available modification would meaningfully improve your mission success.

Use your progression track and current Weapon Part balance to make that decision.

How to Find Weapon Mods in the Campaign

Campaign uses a different acquisition system from Horde Siege.

Instead of repeatedly farming Weapon Parts through multiplayer extraction, players explore the environment for Hard Cases and complete Secondary Objectives.

These activities unlock modifications and additional slots.

Look for Yellow Hard Cases

Hard Cases contain valuable upgrade rewards.

They can include Weapon Mods and additional modification slots.

The campaign begins introducing this system in Act 2, Chapter 2, where players gain access to weapon customization at a Supply Cache.

When exploring, watch for nearby-case notifications and use Tac-Com to help identify potential pickups.

Some cases appear off the main route, so checking nearby buildings and accessible side areas can be worthwhile.

Complete Campaign Secondary Objectives

Campaign Secondary Objectives can reward modifications and mod slot unlocks.

These should not be confused with Horde Siege's repeatable optional missions, even though both systems use the term Secondary Objectives.

The Campaign rewards are tied to its own customization and exploration progression.

When an optional mission offers a useful upgrade, completing it can be worthwhile before advancing further into the story.

Equip Mods at Supply Caches

Finding a Weapon Mod doesn't always mean it's immediately active.

Visit a Supply Cache to inspect and equip your available modifications.

Some modifications can conflict because they change the same weapon component.

For example, two different barrel modifications may require you to choose one rather than equipping both.

Pay attention to the modification's benefits and drawbacks before changing your loadout.

Campaign Mod Locations Worth Checking

Several post-launch guides document useful early and mid-campaign pickups.

Examples include:

  • Act 2, Chapter 2: This chapter introduces the customization system and contains multiple Hard Cases and modification opportunities.

  • Near Monroe Library: A reported Hard Case location contains Skeleton Frame for the Longshot.

  • Act 2, Chapter 3, beneath the Gears statues: A documented Hard Case contains Forged Barrel for the Longshot.

  • Act 3, Chapter 1, firing range: A documented case contains Huge Magazine for the Prototype Lancer and Slick Breech for the Gnasher.

  • Act 3, Chapter 2, near the damaged Gnasher: A reported case contains Tactical Scope for the Longshot and Cut Magwell for the Lancer Mk1.

These are Campaign pickups, not guaranteed repeatable Weapon Parts farming locations.

If your current objective is purchasing Horde Siege Weapon Mods, prioritize Horde Siege instead.

Common Weapon Parts Farming Mistakes

Many players make their Weapon Parts grind harder than necessary.

Avoid these mistakes to improve your results.

  • Ignoring Secondary Objectives.

    Optional objectives can provide Weapon Parts and useful equipment. Ignoring them entirely may reduce your reward opportunities, especially in longer missions.

  • Claiming Stockpile rewards without understanding the objective.

    Community reports suggest certain Stockpiles reward cooperative participation and progression within a capture area. Read the in-game instructions before rushing to claim the reward.

  • Trusting outdated beta farming numbers.

    Weapon Part rewards from Invasions and Stockpiles were reduced during launch tuning. Older videos may no longer represent realistic payouts.

  • Farming higher difficulties without adequate equipment.

    Increased rewards cannot compensate for constant mission failures. Choose a difficulty your squad can complete consistently.

  • Spending Energy as though it were Weapon Parts.

    Energy supports equipment purchases during missions. Weapon Parts are the resource used to purchase unlocked Weapon Mods.

  • Purchasing mods for weapons you rarely use.

    A specialized upgrade may look impressive but provide little practical benefit when the weapon isn't part of your usual build.

  • Ignoring cross-class weapon sharing.

    Investing in commonly used weapons can improve several class loadouts. Don't overlook this when planning purchases.

  • Confusing Campaign mods with Horde Siege farming.

    Campaign Hard Cases unlock campaign customization options. They should not be treated as a repeatable source of Horde Siege Weapon Parts.

  • Failing extraction after collecting valuable Parts.

    This is one of the most costly mistakes. Protecting a successful extraction is essential for retaining mission-collected resources.

  • Expecting one farming method to work identically in every mission.

    Objectives, modifiers, encounters, and squad performance can change the rewards and risks. Adapt your decisions to the current battlefield.

Gears of War: E-Day Weapon Parts and Mods FAQ

What Are Weapon Parts Used for in Gears of War: E-Day?

Weapon Parts are used to purchase Weapon Mods that have already been unlocked through Horde Siege class progression.

These modifications improve weapon characteristics or alter their functionality.

What Is the Fastest Way to Farm Weapon Parts?

Completing useful Secondary Objectives, targeting Weapon Part Stockpiles, participating in manageable Invasion Events, and extracting successfully are reliable approaches.

However, no universal fastest Parts-per-hour method has been established through independently verified testing.

Where Can You Find Weapon Part Stockpiles?

Weapon Part Stockpiles appear as one type of COG Resupply during Horde Siege missions.

Their availability can vary, and collecting their rewards may require cooperation with other squads.

Do Weapon Part Stockpiles Give More Parts With More Players?

Recent community reports suggest that participation and progression within the Stockpile area can affect reward rarity and final payouts.

However, the complete scaling formula has not been officially documented.

Do You Lose Weapon Parts When You Die?

Weapon Parts collected during a mission are only retained when your squad successfully extracts.

A player can die and still benefit if the squad completes extraction, but a failed mission does not bank the collected Weapon Parts.

Can You Farm Weapon Parts in Campaign?

Campaign has a separate exploration-based mod unlock system using Hard Cases and Secondary Objectives.

It is not the confirmed repeatable farming source for the Horde Siege Weapon Parts resource.

Does Difficulty Affect Weapon Parts Rewards?

Higher Horde Siege difficulties offer increased rewards.

However, increased difficulty also creates greater risk of failure.

The most efficient choice depends on successful extractions and actual retained rewards.

Are Weapon Mods Shared Between Classes?

Yes.

In Horde Siege, customization is shared across classes that equip the same weapon.

A weapon modified while playing Assault retains those modifications when another eligible class uses it.

What Are the Best Weapon Mods to Buy First?

Cover Brace and Precision Rifling are useful options for accurate Prototype Lancer combat.

Slick Breech and Auto-Pouch are attractive for Gnasher users.

The best purchase depends on your preferred weapon, available slots, and class progression.

Can You Equip Multiple Weapon Mods?

Yes, subject to the weapon's available modification slots and compatibility rules.

Some upgrades modify the same weapon component and cannot be equipped simultaneously.

Do Weapon Mods Work in Versus?

No.

Versus uses standardized starting equipment without Weapon Mods.

The customization system applies to supported PvE gameplay rather than competitive weapon advantages.

Are Weapon Parts the Same as Energy?

No.

Weapon Parts purchase unlocked Weapon Mods.

Energy is a shared squad resource used for equipment and upgrades during Horde Siege missions.

Conclusion – Farm Smarter and Upgrade the Weapons You Actually Use

Weapon Parts are essential for players who want to unlock more customization options in Gears of War: E-Day.

But collecting them efficiently requires more than simply fighting through difficult missions.

The best approach is to combine worthwhile reward opportunities with reliable extraction.

Secondary Objectives provide practical opportunities to earn additional resources, while Weapon Part Stockpiles reward players who understand the value of cooperation.

Invasion Events can also provide rewards, although their increased difficulty and adjusted payouts make them less reliable as a universal farming method.

Once you've collected enough Parts, focus your spending on weapons that genuinely improve your gameplay.

Upgrade frequently used firearms, take advantage of cross-class customization, and choose modifications that address real combat weaknesses.

Most importantly, remember that a successful extraction protects your progress.

A valuable Stockpile means nothing if your entire squad fails before reaching the Raven.

Farm the Parts, survive the mission, and spend your upgrades where they'll make the biggest difference.

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