1
Cheapest way in
×4
×4Incendiary Rocket137.5 HP per hit
Sulfur1,200
sulfur ore
sulfur oreTime18sto get in
BenchWB2to craft
137.5 HP per hit · 4 hits on 500 HP−50 HP overkill
Not a raid targetPlayers don't spend boom on this. They leave it, or shoot it if it's shooting at them.
Compare tools
11 tools · full bar = 4× the bestSort
ToolBench
Incendiary RocketWorkbench 2WinnerCheapest sulfur×41,200 BestWB2
Explosive 5.56 Rifle AmmoSemi-Automatic Rifle · Workbench 3×1674,175 ×3.5WB3
Timed Explosive ChargeWorkbench 3Fastest×24,400 ×3.7WB3
Mortar ShellMortar · Workbench 2×175,100 ×4.3WB2
RocketWorkbench 3×45,600 ×4.7WB3
High Velocity RocketWorkbench 2×316,200 ×5.2WB2
Satchel ChargeWorkbench 1 · ~17 with duds×136,240 ×5.2WB1
Propane Explosive BombPlaced · Workbench 2×76,300 ×5.3WB2
Beancan GrenadeThrown · Workbench 1 · ~70 with duds×597,080 ×5.9WB1
F1 GrenadeThrown · Workbench 2×28617,160 ×14WB2
40mm HE GrenadeMultiple Grenade Launcher · Found in lootLoot only×28LootWhy ×4?
How the game gets the number
500 HP÷137.5 per hit=3.64→ round up →×4Fire keeps burning after it lands, which the game files don't spell out, so 137.5 HP each is worked out from the burn, not a single hit.
Raw components
for 4× Incendiary Rocket
Intermediates flattened into raw components (gunpowder, explosives, low grade).