11:07 AM PT -- Sources tell TMZ Birdman has apologized to DJ Envy since the incident this morning.
Birdman came ready for war when he walked into a radio interview ... then dropped a bunch of threats on "The Breakfast Club" hosts before storming out of their studio.
It was a bizarre scene Friday morning -- the Cash Money CEO strolled in with at least 6 or 7 dudes, and immediately blurted out, "Stop playing with my f**king name!" He went on to tell Charlamagne tha God he was gonna handle their beef in the streets, but decided to do it face-to-face instead.
The backstory: Birdman's pissed Charlamagne, Angela Yee and DJ Envy and their guests clown him about not paying his artists ... a la Lil Wayne.
Check out the showdown ... Birdman ain't laughing and the scene was INTENSE.