Rocky, whose real name is Rakim Mayers, is accused of firing a gun at Terell Ephron, also known as A$AP Relli, a former friend and member of the A$AP crew of collaborators they were part of at school in New York.
At the start of the trial, jurors were shown surveillance videos that prosecutors argue make it clear Rocky fired a gun at Ephron outside a parking garage in Hollywood.
However, Mr Tacopina said in his defence opening statement that the gun was not real, but rather a starter pistol carried as a prop.
A$AP Rocky will not give evidence at his trial over allegations he fired a gun at a former friend and collaborator.
The star's lawyer, Joe Tacopina, previously said he was "eager to tell his story" and would "love the opportunity to do so", but putting a defendant through a potentially long cross-examination can often be risky in criminal cases.
