Boss Chest (Tier 1)
Chopper's weapons: Upper Blade, Lower Blade
- Tier1
- GradeUncommon
- RackBoss Chest
- Weapons ofChopper
- 10 rewards
- ID620104
Opening it gives one reward. Each cell is that reward's stored weight as a share of the box's total (1,000,000,000): a share of weight, not a confirmed chance.
Rewards
| Reward | Common | Uncommon | Rare | Unique | Epic |
|---|---|---|---|---|---|
 Worn Upper Blade Upper Blade · Tier 1 | 14.4% | 33.8% | 13.7% | 2.5% | 0.65% |
 Worn Lower Blade Lower Blade · Tier 1 | 7.8% | 18.2% | 7.3% | 1.3% | 0.35% |
| Any reward of that grade | 22.2% | 52% | 21% | 3.8% | 1% |
Source: Game client, full game build 26611958 (read 2026-11-12). ItemRandombag 920104.
Where It Drops
| Stage | From | Box | Weapon | Per kill |
|---|---|---|---|---|
| 1-1 | Elites and bosses | 51% | 35.9% | 18.31% |
| 1-2 | Elites and bosses | 40.8% | 35.9% | 14.65% |
| 1-3 | Elites and bosses | 40.8% | 35.9% | 14.65% |
| 1-4 | Elites and bosses | 40.8% | 35.9% | 14.65% |
| 1-5 | Elites and bosses | 30.6% | 35.9% | 10.99% |
| 1-6 | Elites and bosses | 30.6% | 35.9% | 10.99% |
| 1-7 | Elites and bosses | 30.6% | 35.9% | 10.99% |
Per kill: the chance of a weapon box; it is one of the weapon boxes of the heroes in your squad, picked at random, so this one only drops while Chopper is in the squad (one weapon box in three with a full squad of three). Before Engraving bonuses to drop rates.
Chances from StageDropConfig, read the way the game's code (DropController) rolls them.