Machine Gun is the second album by jazz saxophonist Peter Brötzmann, released on the Bro label in 1968, later reissued on the FMP label in 1971. In 1990 FMP issued the album on CD, adding two previously unreleased alternate takes. In 2007, Atavistic Records reissued the album again as The Complete Machine Gun Sessions, adding the only live recording of the title piece (previously issued on the Fuck DeBoere CD). In 2011 the label Slowboy reissued the first studio take again on vinyl in tip-on style cover with 3 color silkscreen.
The Penguin Guide to Jazz awarded the release four out of four stars plus a special "crown" accolade, and placed it in its "core collection" of jazz albums. The review states that while "the recording is crude," the three saxophonists "fire off a ceaseless round of blasting," resulting in "fearsome power."