A Microburst Flask is a nonstandard ammunition type for Imperial Plasma Weapons. Filled with much higher concentrations of heavy ions, Microburst Flasks allow a Plasma Weapon to fire smaller but denser bursts at farther ranges and with greater armour penetration, though at the cost of less overall damage output.
Microburst plasma is cooler, however, but many users prefer that, given standard Plasma Weapons' tendency to catastrophically overload. However, this also prevents the weapon from being fired in overcharge mode.
Sources[]
- Rogue Trader: Into the Storm - The Explorer's Handbook (RPG), pg. 128