An off-duty MTA Conductor was arrested for resisting arrest after baring a firearm Sunday morning, according to police.

Najae Paige, 29, entered a building just after 1 a.m. in East Harlem where he lifted his shirt and a revealed a firearm, cops said.

Upon police arrival, Paige became combative and resisted arrest, according to police sources.

He was arrested on a slew of charges including resisting arrest, menacing, obstructing governmental administration, and criminal possession of a weapon, according to police.