No way, a knife isn't allowed to be used in an MMA fight. There are no rules against those fast strikes.
Printable View
Are neck strikes illegal in MMA?
Yea unfortunately it's worthless when you're against more than one opponent. No one wants to be getting stomped in the face while finishing their triangle lol. That's why I like to train Muay Thai just as often as JJ. Plus striking is so satisfying for stress and anxiety relieve. Nothing like beating the shit out of a good heavy bag :)