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Single structure · Solo · 308 supplies · Large hammer

How to build the L81 Mortar

Placement, protection and cost of the L81 Mortar: 91 supplies on the menu, large hammer, FOB required.

Data only· Patch 0.11· Sep 18, 2026Updated Sep 18, 2026
  • 1–2 Players
  • Large hammer
  • Support level 8
  • FOB required
  • 6 min
  • Support 8 · placer
Build modeDownload PNG
Generated preview1 cell = 1.5 m
Blueprint, top-down view16 pieces on a 11 × 7 cell grid (1 cell = 1.5 m).202520HESCO Block (Small) (23,18)HESCO Block (Small) (24,18)HESCO Block (Small) (25,18)HESCO Block (Small) (26,18)HESCO Block (Small) (27,18)Forward Operating Base (19,19)FOB9HESCO Block (Small) (23,19)L81 Mortar (24,19)HESCO Block (Small) (27,19)HESCO Block (Small) (27,20)HESCO Block (Small) (27,21)HESCO Block (Small) (23,22)HESCO Block (Small) (24,22)HESCO Block (Small) (25,22)HESCO Block (Small) (26,22)HESCO Block (Small) (27,22)1 cell = 1.5 mFOB consoleHESCOEmplacement
231 menu · ≈308
Show as table
#Structurex,yzPhase
consoleForward Operating Base19,1901
l81-mortarL81 Mortar24,1901
box-n0-n1HESCO Block (Small)23,1802
box-n0-n2HESCO Block (Small)24,1802
box-n0-n3HESCO Block (Small)25,1802
box-n0-n4HESCO Block (Small)26,1802
box-n0-n5HESCO Block (Small)27,1802
box-e0-e1HESCO Block (Small)27,1902
box-e0-e2HESCO Block (Small)27,2002
box-e0-e3HESCO Block (Small)27,2102
box-s0-s1HESCO Block (Small)23,2202
box-s0-s2HESCO Block (Small)24,2202
box-s0-s3HESCO Block (Small)25,2202
box-s0-s4HESCO Block (Small)26,2202
box-s0-s5HESCO Block (Small)27,2202
box-w0-w1HESCO Block (Small)23,1902

Cost

Menu
231 supplies
≈ To finish
≈308
Starting stock
1,250 · Covered by the kit stock
Pallets
1 (0 extra)
Ural trips
0
Cash per match
$9,900
One-time unlocks
$75,000
Builders
1

Modules used

Parts list

StructureQtyEachMenu≈ To finishHammer
Phase 01 · 91 → ≈121
L81 Mortar19191≈121Large hammer
Forward Operating Base1300≈0Small hammer
Phase 02 · 140 → ≈187
HESCO Block (Small)1410140≈187Small hammer
Total16231≈308Large hammer

Build phases

Short-range indirect fire (about 700 m). Holds three shells, reloads from the FOB’s Ammo supplies. One direct hit kills infantry, about two for vehicles or structures. Needs flat ground and a clear barrel arc: your own wall inside the arc detonates the shell on you. Keep the ring one block high and relocate after two fire missions.

Phase 01

Place and build

Open the radial (right mouse + F), page with F until you find the L81 Mortar, place it with a green hologram and hammer the yellow X markers. Short-range indirect fire (about 700 m). Holds three shells, reloads from the FOB’s Ammo supplies. One direct hit kills infantry, about two for vehicles or structures.

Phase 02

Protect it

Ring the pit with small blocks only: a tall wall inside the barrel arc detonates your own shell. Leave a two-cell gap toward the console for the ammo runner.

Engine notes

  • Disputed running.ammo: 30 (allthings-cluster) vs 75 (wardogs-zone-db) vs 100 (steam-jtshoo).
  • HAMMER_ESCALATION · phase 2
  • DISPUTED_VALUE

In-game proof

No in-game proof yet. Built it? Send a screenshot.

Sources

  • skycoach-building
  • steam-jupliket
  • allthings-cluster
  • wardogs-zone-db
  • Verified on Sep 18, 2026, Patch 0.11 · Methodology

Any · Flat · Mortar

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Duo · 2–3 Players · Medium hammer

Duo FOB Core with Vehicle Gate Airlock

Two players, one truck: a boxed console inside a 13×13 ring with a two-gate vehicle airlock, slalom and wire. The base every logistics run starts from.

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