A former gang boss and convicted felon in Chicago pleaded guilty Thursday to federal weapons charges after he fired a gun at a suburban shooting range and bragged about it on social media.

Labar Spann, 38, fired a Glock 19 at Midwest Sporting Goods in Lyons, Illinois in September 2014, according to a press release from the U.S. attorney’s office.

Spann, also known as “Bro Man,” used to lead the Four Corner Hustlers on Chicago’s West Side. Prosecutors say he went to the gun range in 2014 with two other people and posted a number of photos and videos to social media.

“(Spann) posted one photograph of a shooting target depicting the silhouette of a person with holes in the head and chest,” his plea agreement says. “(He) posted a caption related to the photograph that read: ‘y’all know I had to go first just to show my bitch how this shit work lmao I do this shis.’”

Spann, who uses a wheelchair after being wounded in a shooting, has felony convictions dating back to 1996. In 2003, he was acquitted of the murder of a Latin King gang member.

He pleaded guilty to one count of illegal possession of a firearm by a felon, three counts of obstruction of justice, and one count of possession of a controlled substance with intent to distribute, “namely, a quantity of a mixture and substance containing a detectable amount of cocaine base.”

As a felon, Spann was not lawfully allowed to possess a firearm.

The obstruction charges stem from Spann’s efforts to impede witness testimony. Initially, a witness told law enforcement that Spann had handled and fired the gun at the range. Later, the witness, Ladonah Hampton, said she didn’t recall seeing Spann firing the gun, according to court records.

He’s scheduled to be sentenced on Sept. 5, and faces up to 70 years in prison.