Cryo Round technology is used to modify standard weapon slugs. A cooling laser collapses the ammunition into Bose-Einstein condensate, a mass of super-cooled subatomic particles capable of snap-freezing impacted objects.
Normandy's scientists have found a way to apply this technology on a large scale: by generating a mass effect containment "bubble," this proof-of-concept large weapon technology is effective against armor, shields, and biotic barriers. It is nicknamed the "Cryo-Blaster."
Still in its experimental stages, the M-622 Avalanche generates a Bose-Einstein condensate within a mass effect bubble which dissipates on impact, violently spraying the condensate outward and coating the target in a near-absolute-zero superfluid.
The Avalanche is unreliable, at times merely coating its target with ice, defacing exposed skin and freezing armor joints. Such low temperatures cause great damage to electronics like kinetic barrier emitters, which sometimes leads to total systems failure. At the other extreme, the Avalanche freezes flesh and bone, causing massive trauma as blood vessels constrict and frozen blood expands. Occasionally such iced tissue shatters.