Bassist Hunter Burgan’s No. 1 is the only 4-string he uses on the road and in the studio—it’s a 2012 Fender American Standard Precision bass. He uses Ernie Ball Slinky Bass strings that are gauged .045–.105. He uses a pick 90 percent of the time, 9 percent he’ll pluck away with his fingers for moodier parts, and 1 percent is where you’ll see him make a fist a hammer his bass during the second verse of “Miss Murder.”