The reality star reportedly documented the entire incident and sustained injuries to his neck.
Perhaps the most damning was the allegation that Chyna had lunged at Kardashian in an attempt to strangle him with an iPhone charging cable.
30 year old Rob and his half-sister Kylie - who owns the property where the alleged altercation is said to have taken place - are suing Chyna (real name Angela Renee White) for battery, assault and vandalism, according to the New York Daily News and The Blast. Rob and Chyna have other issues they need to figure out, but this is a good start.
After finalizing their child custody agreement with an undisclosed settlement, Rob Kardashian and Blac Chyna are headed back to court, and this time it's getting pretty serious.
The reclusive "Keeping Up With the Kardashians" star claims that on the night of December 14, 2016, his ex-fiancée called two of his friends on FaceTime while playing with Rob's gun, "unaware if the gun was loaded or if the safety was on" - and at one point even pointed the gun at the camera and told Rob's friends "not to mess around". In the documents, he reportedly claims that Chyna chucked a chair at the vehicle as he tried to leave the house.
In documents obtained by the publication, the sock entrepreneur claimed she had drugs and alcohol in her system on the night of December 14, 2016, when they had an argument.More news: Sessions says DOJ will increase efforts to protect free speech on campuses
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It can't be easy when you want privacy and you're related to the Kardashian girls!
However, it's been reported by TMZ that she is still seeking "a seven figure" sum to settle with her former fiance over his social media posting of explicit photos and his x-rated rant against her in July.
Clearly there's no love lost between the exes.
The reality TV couple still isn't done duking it out - in court.
Rob and Blac split at the beginning of 2017.