Jennings said recording the album made him a more confident lead player, explaining that Manson frequently encouraged him to perform instrumentation he was not familiar with during recording sessions. As a result, he plays bass guitar, keyboards and lead guitar on most songs on the album, and also created all of the drum programming. He said several guitars were used to record We Are Chaos, but that the album predominantly features a black Gibson SG given as a gift to him on his 20th birthday by his father Waylon Jennings. Other guitars used include a reconstructed 1963 white Gibson SG given to him by Dave Cobb, as well as Manson's own Airliner guitar, which Manson would also use to record various guitar parts. The primary amplifier used was a Gallien-Krueger 250 ML Series 2, as its dual-speaker system could record guitars in stereophonic sound. Jennings complimented the amplifier for its ability to modify guitar tones. A Fender Super Champ was used as a "cool alternative", with Jennings saying: "That thing is magical. You can dial in Jimmy Page or you can dial in the Beatles, or fucking Eric Clapton if you want". Various instruments were processed using an Eventide H910 Harmonizer. Although Jennings said he preferred the Eventide H-10, Manson insisted on using the older H910 model, saying: "This is the David Bowie sound!"
