A second member of the alt-right hate group Proud Boys was busted by the NYPD for a brawl with antifa counter-protesters — as a number of other members of the organization discussed their surrender, a high-ranking police source confirmed.

John Kinsman, 39, turned himself in to Manhattan’s 19th Precinct Friday morning and was charged with attempted gang assault, attempted assault, riot and criminal possession of a weapon for the Oct. 12 beatdown against a trio of antifa members who were protesting Proud Boys founder Gavin McInnes’ speech at the Metropolitan Republican Club, police and law enforcement sources said.

Prosecutors described Kinsman as the “single most vicious” of the Proud Boys brawlers, during a Friday evening arraignment, where he was held on $25,000 bond.

Kinsman — who has a large “Proud Boys” tattoo on his right arm — nodded multiple times as his lawyer, Ronald Hart, argued the charges were too severe and the case had been overtly politicized.

Proud Boys has been labeled a hate group by the Southern Poverty Law Center.

“Conversations” about surrendering “are ongoing” with at least another seven members wanted for the attack, police sources added, while McInnes told the New York Times the members would be in custody “tonight.”

Prosecutors said Friday a total of 10 suspects were involved in the attack.

Geoffrey Young, 38, was arrested yesterday for the brawl and was released on his own recognizance Friday afternoon for rioting and attempted assault charges.

Young was caught on surveillance video punching a counter-protester in the face, putting them in a headlock and kicking a second counter-protester in the stomach, prosecutors said. A person who witnessed the attack and filmed it captured Young kicking a counter-protester in the head at least three times, court papers said.

A lawyer for Young said he had the right to defend himself against the counter-protesters, who were throwing bottles at him and the other Proud Boys.

Police tried to get Young to convince his fellow group members to surrender, a source said, but it’s unclear if he succeeded.

Additional reporting by Alex Taylor