Brooklyn-based indie rockers Dirty Projectors dropped by Late Night With Jimmy Fallon last night to play the lead single “Gun Has No Trigger” off the forthcoming Swing Lo Magellan, which is out July 10 on Domino. As Fallon points out, this was their first live appearance in more than a year; and moreover, it was for many a first taste of Dirty Projectors sans wily vocalist Angel Deradoorian, who is on hiatus from the band. No fear, though! A shaggy looking David Longstreth took reign over a pared down backing band (drums, bass) and a gaggle cooing back-up vocalists, leading a performance of the new song so sharp with focus that it penetrated the airwaves and had us at home completely gripped. Stillness of course being their move, the song builds through soft, harmonizing “oohs,” but never triggers. And for that, it’s all the more powerful.