Periphery is an American progressive metal band from Bethesda, Maryland, formed in 2005. History Formation and Lineup Changes (2005 - 2009) Periphery was formed by guitarist Misha Mansoor in 2005. He slowly gained a reputation on the Internet, primarily via a regularly-updated Soundclick account, Meshuggah and John Petrucci forums, and the sevenstring.org message boards. Before and during Periphery's tenure in the metal scene, Mansoor developed a reputation for doing his own audio production