16-year-old NYC rapper C Blu is back in jail.

Last month, the rising drill star shot a cop and himself in The Bronx as they struggled over a stolen gun Blu was in possession of.

Neither was seriously injured.  Blu was arrested on charges of felony assault and criminal possession of a weapon and bail was set at 250K.

Blu was able to use his record company advance to secure a bond, a decision that enraged New York mayor Eric Adams.

His freedom didn't last long.

Earlier this week C-Blue was taken back to Crossroads Juvenile Center in Brooklyn because the stolen gun he allegedly used to shoot the cop in The Bronx violated his probation.

It's not clear why he wasn't hit with the probation violation when he was arrested for shooting the cop.

Blu's lawyer hasn't commented on this latest twist.