The possession charge stemmed from a June 3, 2014 arrest for a gun found at a pal's apartment in Brooklyn.
He told cops at the time it was rap video prop.
"I use my gun for videos- I'm a rapper," he said, according to court papers.
After serving the fixed seven year term, Shmurda, 22, will be on probation for five years, according to the terms of the plea agreement worked out with the Special Narcotics Prosecutor's office.
After Shmurda was arrested in December of 2014, his then-lawyer called the charges against him - which included murder conspiracy - "bulls---." Shmurda even filed suit against the city and NYPD earlier this year over the gun charge he admitted to Friday.