Special forces officers rushed to the scene on Wednesday, after several members of the public called the police to warn them that a man was driving around town toting a gun.
The rapper was using two cars and several imitation guns to shoot clips for a music video.
A video posted online by a member of the public showed heavily armoured special forces officers turn up at a scene where a sports car had been stopped. Two men were told to lie flat on the ground as police searched them.
“Just an everyday police check,” the man shooting the video observed, dryly.
The rapper was ordered to leave the area and faces charges over contravention of German weapons laws.
It is illegal in Germany to display replica guns in the public, in order to avoid confusion.