A Queens man was busted with more than 70 weapons — and an “unprecedented” 50,000 rounds of ammunition — in his basement, police said Monday.

The haul was one of the largest weapons seizures in the city under a single search warrant, NYPD Chief of Intelligence Thomas Galati said at a press conference announcing the bust.

Ronald Drabman, 60, was arrested Sunday after an investigation led NYPD cops from Brooklyn to the weapons cache in his basement on 208th Street in Oakland Gardens, authorities said. Drabman has two prior arrests, including for possessing an illegal .357-caliber handgun in 2017, police said.

The NYPD’s emergency services squad executed a search warrant at Drabman’s home early Sunday and recovered the 71 guns and 50,000 rounds of ammunition, police said.

Drabman’s cache included 23 handguns and 45 rifles, shotguns and assault rifles.

“This is one person that possessed all of these weapons, and like I said, an unprecedented amount of ammunition,” Galati said.

Galati praised the coordinated effort by several divisions of the NYPD to make the arrest.

“Collaboration between the criminal intel section, the members of the 81 Precinct, the Emergency Services, resulted in the seizure of this large cache of weapons,” he said.