WarframeAlchemyLab ES
Shell Compression

Farming plan

Shell Compression

Arsenal: Shell Compression
Dropped by
Jackal Rare 7.37 %
Commander Uncommon 0.68 %
Arid Heavy Gunner Uncommon 0.33 %
Corrupted Warden Uncommon 0.33 %
Frontier Heavy Gunner Uncommon 0.33 %
Garv Uncommon 0.33 %
Grineer Warden Uncommon 0.33 %
Heavy Gunner Uncommon 0.33 %
Narmer Gunner Warden Uncommon 0.33 %
Narmer Heavy Gunner Uncommon 0.33 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 8 17 25 34 42 10 runs · 50% 10 runs · 50% 31 runs · 90% 31 runs · 90%

Each run has a 7.37% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.