Quit being fucking nerds. Of course anything that shoots freezing gas will be improved. You can apply it to ANY weapon to increase badassness.    
A fucking ninja star that releases the shit on impact would be equally if not more badass.    
Freezing knumbchucks.  
A bullet that as it enters releases the shit and freezes your innards. 
A jousting stick that freezes the other rider. 
A extra cold sharp icecicle.      
Endless possibilities.