Fastest kill: Observer
Billy Gun with Large Energy Bullet: 3 body hits, 0.38 s, 60 damage per shot. Aiming at the head, ASh-12 with Special AP Bullet (MAG) needs 3 hits (0.23 s).
Observer has 180 base health, body armor 3.2 (Lv.3 Cold-Res Work Suit) and head armor 1.5 (Cold-Res Work Helmet). Update 2.3.30, reviewed .
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Best gun in each class
| Class | Body shots | Headshots |
|---|---|---|
 Assault rifle | AS Val, Special AP Bullet (AR): 12 hits, 0.55 s | AS Val, Special AP Bullet (AR): 9 hits, 0.40 s |
 Battle rifle | Custom M14, Advanced AP Bullet (L): 7 hits, 0.51 s | Custom M14, Special AP Bullet (L): 4 hits, 0.26 s |
 Bow | Repeating Bow, Intermediate AP Arrow: 8 hits, 5.17 s | Repeating Bow, Basic AP Arrow: 5 hits, 2.67 s |
 Magnum | ASh-12, Advanced AP Bullet (MAG): 5 hits, 0.45 s | ASh-12, Special AP Bullet (MAG): 3 hits, 0.23 s |
 Pistol | Custom Glick, Advanced AP Bullet (S): 10 hits, 1.13 s | Custom Glick, AP Bullet (S): 8 hits, 0.88 s |
 SMG | Custom SR-3M, Advanced AP Bullet (S): 17 hits, 0.76 s | Custom SR-3M, AP Bullet (S): 13 hits, 0.57 s |
| Shotgun | Billy Gun, Large Energy Bullet: 3 hits, 0.38 s | Billy Gun, Large Energy Bullet: 3 hits, 0.38 s |
 Sniper rifle | TS-128 Smart Sniper Rifle, Advanced AP Sniper Bullet: 9 hits, 4.00 s | TS-128 Smart Sniper Rifle, AP Sniper Bullet: 4 hits, 1.50 s |
 Special | Cube Gun, Enhanced Small Energy Bullet: 22 hits, 0.95 s | Cube Gun, Enhanced Small Energy Bullet: 20 hits, 0.86 s |
Top 10 body-shot kills
| # | Gun and round | Hits | Time | Per shot | Through armor |
|---|---|---|---|---|---|
| 1 | Billy GunLarge Energy Bullet | 3 | 0.38 s | 60 | 100% |
| 2 |  Custom MP-155AP Shotgun Shell | 3 | 0.38 s | 63.64 | 91% |
| 3 | Custom MP-155Advanced AP Shotgun Shell | 3 | 0.38 s | 70 | 100% |
| 4 |  MP-155 ULTIMAAdvanced AP Shotgun Shell | 3 | 0.38 s | 60 | 100% |
| 5 | ASh-12Advanced AP Bullet (MAG) | 5 | 0.45 s | 38 | 100% |
| 6 | ASh-12Special AP Bullet (MAG) | 5 | 0.45 s | 41.8 | 100% |
| 7 | Custom M14Advanced AP Bullet (L) | 7 | 0.51 s | 27 | 100% |
| 8 | Custom M14Special AP Bullet (L) | 7 | 0.51 s | 28.62 | 100% |
| 9 |  M14Advanced AP Bullet (L) | 7 | 0.51 s | 27 | 100% |
| 10 | M14Special AP Bullet (L) | 7 | 0.51 s | 28.62 | 100% |
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
- Observer boss page: maps, drops, gear and the quests that target it.
- Best ammo for each armor level: which round to load when you face armor 3.2.
- Headshots and crits: when aiming at the head pays off.
- Boss guide: where each boss spawns and how it fights.