Combustion Rounds: Drop sources, locations, and probabilities

Tips

Here is the mission where you can get Combustion Rounds in Warframe:

• Uranus/Caelus : It's a Interception mission (level 24-29). The item is dropped on rotation A (2.51%).

Missions with a Chance to Get Combustion Rounds as a Reward

Warframe Rotations Explained

• Interception: One reward each time 100% control is reached, following this pattern: AABC.
  Rotation A for the first two times, rotation B for the third and rotation C after four.
  Then it restarts from the beginning (5th round is rotation A).

Mobs Dropping Combustion Rounds