Ordnance Heist is not a single mission that ends when one objective marker disappears. It is a short chain of successful extractions: earn a Key Template, finish its assigned task on Dire Marsh, turn it into Firestorm Locker Keys, and carry all three keys into another deployment. The final locker contains the Firestorm power weapon and a separate loot pool that became more valuable after Marathon update 1.1.5.5.
The important change is that the grind is now shorter than it was at launch. A completed template can grant up to three keys instead of one, so a successful conversion can provide the full set needed for a locker. This guide explains the current route, where to look for the locker, how to open it without donating the keys to another crew, and which map offers the best balance of speed and survival.
Marathon Ordnance Heist Dates and Current Rules
Ordnance Heist runs from August 18 at 10:00 AM PT until September 1, 2026 at 10:00 AM PT. Bungie's official Ordnance Heist overview describes it as a multi-run PvPvE chase rather than a separate playlist. Progress moves through Perimeter, Dire Marsh, and a final Firestorm Locker deployment, while rival Runners can interrupt any stage.
| Stage | What you need | Where it happens | What must survive extraction |
|---|---|---|---|
| Collect | UESC Manifests or a Key Template | Perimeter | The currency or template |
| Convert | A Key Template with its embedded objective completed | Dire Marsh, day or night | The completed template, which converts on exfil |
| Open | Three Firestorm Locker Keys | Perimeter, Dire Marsh, or Outpost | The locker loot; Firestorm itself converts to credits |
The event's original rollout is documented in update 1.1.5.4. The September 1 deadline applies to the limited-time Ordnance Heist event. Firestorm itself is not scheduled to disappear from Marathon after that point: Bungie says it can later appear as a possible Supply Drop item in zones that support Supply Drops.
How to Get Three Firestorm Locker Keys
Start by acquiring a Key Template. Bungie has clarified that Key Templates drop from UESC enemies on Perimeter: Elite UESC have a low chance to drop one, Commanders have a good chance, and Wardens are guaranteed to drop one. UESC Manifests can also be used to buy templates from the event inventory, with one available from the MIDA Armory and one from the Traxus Armory per day.
- Enter Perimeter and hunt UESC targets. Commanders and especially Wardens are the most reliable direct route to a template, while regular farming also builds UESC Manifests for Armory purchases.
- Bank the run instead of overstaying. Neither a rare template nor a full Manifest stack matters if it is lost before extraction. A MIDA or Traxus Sponsored Kit adds 15 Manifests after a successful exfil.
- Take one template into Dire Marsh. Read the embedded task before choosing the rest of the loadout. The task must be completed in Dire Marsh, but either its day or night version works.
- Complete the task and extract alive. The template does not become usable Firestorm Locker Keys the moment the objective finishes. Conversion occurs after a successful exfil.
- Check the reward before the locker run. Update 1.1.5.5 raised the output of a completed template to as many as three Firestorm Locker Keys. The locker still requires all three, so confirm that the complete set is available before deploying.
A player starting with no currency and no template should plan around three successful deployments: one Perimeter farm, one Dire Marsh conversion, and one locker attempt. If you already own a template before deploying, the practical minimum is two. You cannot finish a template and spend the resulting keys in the same match because the keys are awarded only after extraction. For players struggling to preserve the first stage, a structured Perimeter extraction run is most relevant at the Manifest and template step rather than after the keys are already complete.
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What Changed in Marathon Update 1.1.5.5
Update 1.1.5.5 addressed both the time investment and the weak reward complaints surrounding the event. According to Bungie's Marathon update 1.1.5.5 notes, the key-output and locker-loot adjustments had already gone live on August 21, with the patch notes providing the clearest official record of the current rules.
- A completed Key Template now grants up to three Firestorm Locker Keys instead of one.
- UESC Manifests are now correctly shared among crew members when the crew extracts.
- Players affected by the earlier sharing problem should check their mailbox for the previously issued 150 Manifests if they have not claimed them.
- Firestorm Arms Lockers now make more loot rolls for implants and cores.
- Implants and cores have a higher chance to appear at Prestige rarity.
- Weapon chips and consumables appear slightly less often to make room for the improved implant and core rolls.
The phrase "up to three" matters. Bungie's official wording does not state that every completed template is guaranteed to produce exactly three keys. Current player reports frequently show the full three-key reward, but the safest approach is still to inspect the result after exfil before preparing the final locker deployment.
Key Template Objectives on Dire Marsh
Key Templates do not all carry the same Dire Marsh task, so there is no universal checklist that can be completed before you inspect the item. Reported objectives include landing melee hits on UESC Recruits, defeating Commanders, damaging hostiles with explosives, destroying turrets or explosive canisters, opening lockboxes or a safe, activating a Guarded Exfil, and stabilizing an anomalous sample. These examples come from live player reports rather than an official Bungie list of every possible objective.
Build around the exact verb used by the template. A melee-hit objective calls for a route with accessible recruits, not a Commander hunt. An explosive-damage task needs a reliable explosive source before deployment. A safe or lockbox task rewards map knowledge and enough backpack space to avoid wasting time in the loot interface. The most common preventable mistake is bringing a strong general loadout that cannot perform the specific interaction named by the template.
Finish the template early and treat extraction as the new mission. If the objective sends you into a contested point, clear the immediate angles, complete only what the template asks, and leave instead of turning the key run into an inventory-farming run. Players who repeatedly lose completed objectives on the way out may find a planned Dire Marsh route more useful than simply adding more expensive equipment.
Where Firestorm Lockers Spawn
A Firestorm Locker can be used on Perimeter, Dire Marsh, or Outpost. Bungie confirms all three zones as valid destinations but does not publish one permanent coordinate for each map. Current player reports also show lockers appearing at different locations between deployments, so old screenshots should not be treated as permanent spawn maps.
Bring all three keys into the chosen zone and check the map as soon as the deployment begins. Players consistently report that a usable Firestorm Locker is shown on the map in a way similar to a key-room objective when the required keys are present. Because Bungie has not documented the exact marker behavior in its event overview, treat the marker details as a live gameplay observation rather than a guaranteed permanent UI rule.
| Zone | Why choose it | Main risk | Best fit |
|---|---|---|---|
| Perimeter | Familiar routes and generally straightforward navigation | Open approaches can expose the crew before it reaches cover | Solo players and crews prioritizing a familiar extraction route |
| Dire Marsh | Lets you reuse recent route knowledge from the template stage | Visibility, terrain, and contested exits can slow the escape | Players already comfortable with Marsh rotations |
| Outpost | Compact routes can make a favorable locker spawn quick to reach | Close and vertical fights punish a poor entry or retreat | Coordinated crews comfortable with Outpost PvP |
There is no official evidence that one of these maps gives a better Firestorm Arms Locker loot table. The map decision changes travel time, PvP pressure, and extraction probability, not the documented reward weighting. For a first attempt, use the zone where your navigation and extraction rate are most consistent rather than assuming one map has inherently better loot.
How to Open the Firestorm Locker Safely
The safest locker attempt starts before matchmaking. Put the three keys in the correct inventory, reserve enough backpack space for the improved implant and core drops, and carry a dependable weapon that works without relying on the Firestorm. The power weapon is the reward, not the tool that gets you safely to the locker.
- Choose an extraction before moving to the locker. Identify a primary exit and one fallback. The fastest escape is decided before the loot appears.
- Approach from cover and pause outside the final lane. Listen for UESC combat, footsteps, opened doors, and gunfire that suggests another crew is already watching the area.
- Clear the nearby angles first. Do not interact while every teammate stares at the locker. One player opens it while the others cover the entrance, flank, and likely retreat path.
- Take priority items before comparing rolls. Secure Prestige implants, useful cores, and the Firestorm first. Detailed inventory sorting belongs in cover or after extraction.
- Leave on the route selected at spawn. If fighting starts behind you, do not automatically turn back for a second look at the container.
Players currently report that opening the Firestorm Arms Locker does not produce the obvious map-wide alert associated with some other valuable interactions. Treat that as a community-observed behavior rather than a permanent stealth mechanic. Rival Runners already know the event route and can camp likely approaches without needing an alert. If the locker appears to have already been opened, do not cross an exposed area simply to confirm that the valuable loot is gone.
Firestorm Locker Loot After Patch 1.1.5.5
The locker now matters for more than the temporary weapon. Its officially documented upgrade favors implants and cores, including a higher chance for Prestige-rarity versions. This makes the container more valuable even for a player who intends to spend Firestorm's ammunition during the same deployment.
- Firestorm: a heavily customized Hardline HPR frame with a sniper optic and incendiary explosive rounds.
- Implants and cores: more loot rolls than before update 1.1.5.5, with improved Prestige-rarity odds.
- Weapon chips and consumables: still part of the reward mix, but their item count was slightly reduced by the patch.
- Other valuable equipment: players continue to report purple weapons, shields, and occasional Prestige equipment, but Bungie has not published a complete item list or drop-rate table.
Do not treat a screenshot or a handful of community openings as a confirmed drop rate. The update 1.1.5.5 player discussion contains examples of improved locker results, but those samples cannot prove that a Prestige shield, a specific weapon chip, or a particular core is guaranteed. The correct expectation is a stronger implant-and-core-weighted locker, not one predetermined loadout.
Fastest Ordnance Heist Route From Zero
The fastest reliable route is the shortest sequence that still protects each extraction. It does not mean sprinting through the center of every map with the cheapest backpack. One death can erase more time than a cautious rotation adds, especially during the final run when all three keys are at risk.
- Run Perimeter for a template or enough Manifests to buy one. Prioritize Commanders and Wardens when practical, and use a Sponsored Kit if its limitations fit your playstyle because a successful exfil adds 15 Manifests.
- Prepare for the rolled task, then enter Dire Marsh. Complete the embedded objective as early as possible. Do not wait for a perfect backpack after the task is done; extract and let the template convert.
- Confirm that you received three keys. The official reward is up to three. If your completed template produces fewer than the full set, complete another template before attempting the locker.
- Choose the locker zone you survive most consistently. Read the marker at spawn, select an exit, open the locker with teammates covering separate angles, and move immediately after taking the priority loot.
- Use Firestorm ammunition when it can protect the run. The weapon cannot be retained, reloaded, or replenished. Unused rounds have no persistent value because Firestorm converts into credits on exfil.
If a template is already in your vault, the route can shrink to two deployments: Dire Marsh conversion followed by the locker. If three finished keys are already available, the event objective can be completed in one locker run. Outpost can produce a short marker-to-locker path in a favorable deployment, but there is no universal fastest map because locker position, enemy pressure, and extraction options vary.
How to Use Firestorm Before Extraction
Firestorm carries six explosive incendiary shots and has no reload or ammunition refill. Its value comes from changing one decisive encounter, not replacing the primary weapon for the rest of the deployment. Keep a normal gun ready for routine UESC targets and save the limited magazine for a rival crew, a dangerous elite, or a blocked extraction.
Use the optic from a position where the explosive impact can pressure enemies near cover, but do not assume the blast removes the need to aim. A missed shot spends one sixth of the weapon's entire ammunition supply. At close range, the scoped handling and tiny reserve make mistakes especially costly, so keep another weapon ready instead of forcing Firestorm into every fight.
Bungie confirms that extracting with Firestorm converts it into credits rather than preserving the gun. Multiple player reports currently show a 7,777-credit conversion, but Bungie has not published that number in the official event description. Treat 7,777 as a live community-observed value rather than a permanently guaranteed amount. Since the weapon itself cannot be retained, there is little reason to protect unused rounds if spending them can secure your extraction and the rest of the locker haul.
Common Mistakes That Waste Firestorm Keys
Most failed attempts are not caused by misunderstanding the three-key requirement. They happen when a player treats the final deployment like an ordinary loot run and adds unnecessary risk after carrying the event's entire progression into one backpack.
- Entering with fewer than three keys: the locker requires the complete set, even though one template can now award up to three.
- Forgetting that conversion needs extraction: completing the Dire Marsh task does not place usable locker keys into the same active run.
- Following an old fixed-location screenshot: reported locker positions vary, so use the current deployment marker instead of memorizing one room.
- Bringing no inventory space: the keys and locker rewards compete for backpack capacity. Decide what can be dropped before opening the container.
- All three players opening the menu: one looter is enough. The remaining crew should watch approaches and protect the exit.
- Sorting every item beside the locker: take the rarest and most useful rewards, move to cover, and make detailed comparisons later.
- Saving every Firestorm shot: the weapon leaves the inventory on extraction, so unused ammunition cannot be carried into the next deployment.
- Assuming reported drops are guaranteed: the patch improves specific reward categories and Prestige odds, but it does not promise a particular shield, weapon, or core.
Repeated failures usually point to route selection, role assignment, or extraction timing rather than insufficient aim. A focused Marathon coaching session fits that problem better than copying a high-cost loadout designed for a different map or crew size.
Marathon Ordnance Heist FAQ
The questions below cover the points most likely to change a player's route or cause a wasted deployment. Where Bungie has not published an exact value, the answer keeps community observations separate from official rules.
How many Firestorm Locker Keys do I need?
You need three keys to open one Firestorm Arms Locker. Since update 1.1.5.5, one completed Key Template can grant up to three keys instead of one.
Where do Firestorm Key Templates come from?
Key Templates drop from UESC enemies on Perimeter. Bungie says Elite UESC have a low chance to drop one, Commanders have a good chance, and Wardens are guaranteed to drop one. You can also buy up to two templates per day, one from each event Armory.
Where do I complete a Key Template?
Complete its embedded objective on Dire Marsh, during either day or night. You must then extract successfully for the finished template to convert into Firestorm Locker Keys.
Where is the Firestorm Locker?
Bungie confirms that Firestorm Lockers can be used on Perimeter, Dire Marsh, or Outpost. Player reports show that their exact locations can vary, so bring all three keys and follow the current deployment marker rather than relying on one old screenshot.
Can I keep Firestorm after extraction?
No. Firestorm converts into credits when you extract. It also cannot be reloaded or replenished, so use its six shots when they can help secure the run.
What is the best map for a Firestorm Locker run?
There is no officially superior map or better documented loot table. Use the zone where you know the routes, PvP angles, and extraction options best. Perimeter is straightforward for many players, Dire Marsh rewards recent route knowledge, and Outpost suits crews comfortable with compact vertical fights.
What did update 1.1.5.5 change about locker loot?
The locker now rolls more implants and cores and gives those items a higher chance to appear at Prestige rarity. Weapon chip and consumable item counts were slightly reduced to make room for the additional rolls.
What happens after Ordnance Heist ends?
The limited-time event ends on September 1, 2026 at 10:00 AM PT. Bungie says Firestorm itself can remain available afterward as a possible Supply Drop item in zones that feature Supply Drops.
Conclusion
Marathon update 1.1.5.5 made Ordnance Heist substantially faster by allowing a completed Key Template to award up to three Firestorm Locker Keys. The current route is to secure a Key Template on Perimeter or through the event Armories, complete its task on Dire Marsh, extract for the keys, and use a full set of three on Perimeter, Dire Marsh, or Outpost. The Firestorm Arms Locker is also more valuable than it was at launch because its revised reward pool makes more implant and core rolls with improved Prestige-rarity chances.
The fastest practical route is the one that minimizes failed extractions. Build specifically for the template objective, leave Dire Marsh once the task is complete, confirm that all three keys are available before the final deployment, and choose the locker zone where your survival rate is strongest. Reserve inventory space, assign one player to loot, choose an exit before approaching the locker, and use Firestorm's six rounds when they can protect the haul. The weapon cannot be carried into another run, but the rest of the rewards can, which makes getting out alive the part of the heist that matters most.
