Lil Wayne‘s tour bus was allegedly shot up by a guy who has very close ties to Wayne’s rival, Young Thug … TMZ has learned.

Atlanta PD got an arrest warrant for the suspect, Jimmy Carlton Winfrey, on May 21 … and he’s been charged with aggravated assault, terroristic threats, possession of a firearm by a felon, and criminal gang activity.

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We’re told by multiple sources in Atlanta that Winfrey has been Young Thug’s road manager — which is incredibly relevant since Thug’s been in a very public feud with Wayne for months.

Thug released a mixtape called “Tha Carter 6” — mocking Wayne’s long delayed album — but changed it to “Barter 6” when he was threatened with a lawsuit.

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TMZ broke the story … Wayne’s bus got blasted back in April as he was leaving a club gig in Atlanta. Police say Winfrey was trying to gain status in the Bloods by “committing a high profile shooting of a rival rap artist.”

Winfrey’s mug shot is from a previous arrest for drug possession in Florida.