Fastest kill: Koko Koko (Island Challenge)
Custom MP-155 with Special Shotgun Shell: 21 body hits, 4.65 s, 98 damage per shot. Aiming at the head, MP-155 ULTIMA with Special Shotgun Shell needs 20 hits (3.90 s).
Koko Koko (Island Challenge) has 2000 base health, body armor none and head armor none. Update 2.3.30, reviewed .
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Best gun in each class
| Class | Body shots | Headshots |
|---|---|---|
 Assault rifle | Pala Gun, Large Energy Bullet: 125 hits, 8.27 s | Pala Gun, Large Energy Bullet: 87 hits, 5.73 s |
 Battle rifle | Storm Gun, Enhanced Small Energy Bullet: 103 hits, 12.85 s | Storm Gun, Enhanced Small Energy Bullet: 67 hits, 7.58 s |
 Bow | Repeating Bow, Basic AP Arrow: 80 hits, 65.17 s | Repeating Bow, Basic AP Arrow: 54 hits, 42.83 s |
 Magnum | ASh-12, Special AP Bullet (MAG): 48 hits, 12.34 s | ASh-12, Special AP Bullet (MAG): 29 hits, 6.68 s |
 Pistol | Custom Glick, Special Bullet (S): 93 hits, 19.20 s | Custom Glick, Special Bullet (S): 67 hits, 13.75 s |
 SMG | Bizon-2, Special Bullet (S): 167 hits, 17.43 s | Custom SR-3M, Special Bullet (S): 117 hits, 12.12 s |
| Shotgun | Custom MP-155, Special Shotgun Shell: 21 hits, 4.65 s | MP-155 ULTIMA, Special Shotgun Shell: 20 hits, 3.90 s |
 Sniper rifle | TS-128 Smart Sniper Rifle, Rusty Sniper Bullet: 91 hits, 67.40 s | TS-128 Smart Sniper Rifle, Special AP Sniper Bullet: 34 hits, 22.90 s |
 Special | Cube Gun, Enhanced Small Energy Bullet: 236 hits, 28.18 s | Cube Gun, Enhanced Small Energy Bullet: 214 hits, 27.18 s |
Top 10 body-shot kills
| # | Gun and round | Hits | Time | Per shot | Through armor |
|---|---|---|---|---|---|
| 1 | Custom MP-155Special Shotgun Shell | 21 | 4.65 s | 98 | 100% |
| 2 |  MP-155 ULTIMASpecial Shotgun Shell | 24 | 4.92 s | 84 | 100% |
| 3 |  MP-155Special Shotgun Shell | 26 | 6.01 s | 77 | 100% |
| 4 | Custom MP-155Rusty Shotgun Shell | 29 | 6.58 s | 70 | 100% |
| 5 | Custom MP-155Standard Shotgun Shell | 29 | 6.58 s | 70 | 100% |
| 6 | Custom MP-155AP Shotgun Shell | 29 | 6.58 s | 70 | 100% |
| 7 | Custom MP-155Advanced AP Shotgun Shell | 29 | 6.58 s | 70 | 100% |
| 8 | MP-155 ULTIMARusty Shotgun Shell | 34 | 7.10 s | 60 | 100% |
| 9 | MP-155 ULTIMAStandard Shotgun Shell | 34 | 7.10 s | 60 | 100% |
| 10 | MP-155 ULTIMAAP Shotgun Shell | 34 | 7.10 s | 60 | 100% |
Custom MP-155: every round it can load
| Round | Body hits | Body time | Head hits | Head time |
|---|---|---|---|---|
 Rusty Shotgun Shell | 29 | 6.58 s | 29 | 6.58 s |
 Standard Shotgun Shell | 29 | 6.58 s | 29 | 6.58 s |
 Special Shotgun Shell | 21 | 4.65 s | 21 | 4.65 s |
 AP Shotgun Shell | 29 | 6.58 s | 29 | 6.58 s |
 Advanced AP Shotgun Shell | 29 | 6.58 s | 29 | 6.58 s |
Assumptions
- Every shot hits. Body shots meet body armor without a crit; aiming at the head makes every shot a crit that meets head armor, which is why the headshot column is faster here.
- Base health from the enemy preset; difficulty health scaling, talents and buffs are not included. Armor keeps its full value for the whole fight.
- Within half the bullet distance. Each emptied magazine adds the gun's full reload time. Explosive weapons are excluded.
Method
Every gun is tried with every round of its caliber. Damage per hit = gun damage × round multiplier ÷ pellets × (crit factor on headshots) × 2 ÷ (armor − AP + 2) × the boss's physical damage factor; hits = health ÷ damage per shot, rounded up; time = (hits − 1) ÷ fire rate plus reloads. Rules: src/rules/escape-from-duckov/damage.mjs, read from the game's Health.cs and ItemAgent_Gun.cs (October 2025 build; not yet re-read on 2.3.30). Round values from the Bilibili Duckov wiki, armor values from the game item data.
Related
- Koko Koko (Island Challenge) boss page: maps, drops, gear and the quests that target it.
- Koko Koko: 792 HP version of the same boss.
- Best ammo for each armor level: which round to load when you face armor 0.
- Headshots and crits: when aiming at the head pays off.
- Boss guide: where each boss spawns and how it fights.