The gun used by the monster who opened fire on a crowded Brooklyn subway Tuesday jammed in the midst of the bloodshed — preventing him from causing more carnage, law enforcement sources told The Post.
Investigators recovered the jammed Glock and two extended magazines at the scene of the shooting, which happened aboard a Manhattan-bound N train just as it was pulling into the 36th Street station in Sunset Park just after 8:20 a.m.
