This article is too short to provide more than rudimentary information about the subject. You can help The Vault by expanding it.
The Cryolator is similar to the flamer, but propels super-chilled nitrogen gas instead of flammable liquid fuel. Consistent exposure to the cloud of cryonic material will eventually freeze most enemies (although large enemies like super mutant behemoths and mirelurk queens cannot be frozen).
The weapon uses rare and expensive ammunition rapidly, meaning discretion must be exercised for continuous use of this weapon. The crystallizing barrel modification remedies this issue by enabling the Cryolator to fire individual cryonic capsules. In addition to being more ammunition friendly, these capsules deal additional ballistic damage. Because it is a heavy weapon, the Cryolator therefore benefits from the Heavy Gunner perk.