Police sources have revealed to TMZ that the embattled rapper was arrested after he sent the threat to the woman via text on Wednesday, July 20, 2016.
Buck is reported to have shown up at her apartment on that day, kicking down the door but touching nothing else.
The police arrested Buck on Thursday, July 21, 2016, but was released on a $5000 bail the following day.
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The American rapper, actor and producer, is also reported to be on a Federal probation, meaning that this latest arrest could make thing even worse for him over violation charges.
Young Buck is also known for his hit single, "Shorty Wanna Ride," off his Straight Outta Cashville album.