Guns aren't stupid, People with Guns Are.

A man was shot in the head with his own gun inside the busy Hoyt-Schermerhorn subway station on Thursday after an altercation with another rider at the height of rush hour, police said.

The shooting occurred inside a northbound A train around 4:50 p.m., when two men – a 32-year-old and a 36-year-old – became involved in a physical confrontation, police said. The alleged shooter was taken into custody right away. The victim went into surgery Thursday evening, according to the NYPD. By Friday, police said he was in critical but stable condition.

The 32-year-old man boarded the A train at Nostrand Avenue when the 36-year-old man, who was already on the train, began arguing with him, according to NYPD Chief of Transit Michael Kemper. Police said the two men did not know each other.

The altercation became physical, and the older man displayed a knife or razor blade, authorities said. The train was still moving when the 36-year-old man pulled out a gun, Kemper said. As the train approached the Hoyt-Schermerhorn station, the 32-year-old wrestled it from him and shot the 36-year-old “more than once,” Kemper said.

“The victim appears to be the aggressor,” MTA Chairman Janno Lieber said at a news conference on Thursday. “Get rid of the guns.”

As of Friday, the alleged shooter had not been charged and police were conferring with the District Attorney's office.

NYPD officials announced Friday morning that the man shot in the subway system with his own gun last week will face charges – if he survives his injuries.

Chief of Detectives Joseph Kenny said Dajuan Robinson would be charged with criminal weapons possession if he recovers from the four gunshot wounds he sustained during a fight with passenger Younece Obuad on a crowded A train last week.

Robinson was seen on video pulling the gun out of his jacket as the altercation with Obuad escalated. Off camera, police said Obuad was able to get the gun away from Robinson, and shot him instead, as the train pulled into the Hoyt Schermerhorn station.

Police said Robinson’s injuries were extensive: two gunshot wounds to the head, one to the chest, and one to the torso, along with two stab wounds in the back inflicted by a woman aboard the train who so far has not been identified.

Officials said she and Obuad knew each other and got on the A train together at the Broadway Junction Station but it’s unclear if she would be charged.

The Brooklyn District Attorney’s office decided not to charge Obuad with a crime for now, saying he appeared to be acting in self-defense.

Robinson was still intubated as of Friday morning.