A US rapper brandishing stolen guns and threatening Donald Trump in a viral video has been arrested after a firearm salesman recognised the missing weapons.

A US rapper brandishing stolen guns and threatening Donald Trump in a viral video has been arrested after a firearm salesman recognised the missing weapons.

"As I’m watching it, I’m thinking these guns are very recognisable. As I watched more, I realized that they were very familiar. They were stolen from me last year," he told

When the gun salesman called authorities he was informed police and the Secret Service were already aware of the social media post made by Demarcus Davis, 22.

When the gun salesman called authorities he was informed police and the Secret Service were already aware of the social media post made by Demarcus Davis, 22.