Synyster Gates, born Brian Elwin Haner, Jr., also known as Syn, is an American musician. He is currently the lead guitarist for Heavy metal band Avenged Sevenfold.

Brian attended and graduated from the Musicians Institute in Hollywood as part of the GIT program, studying jazz guitar. After six months of being there, he got a phone call from Jimmy (and the rest of the current line up of Avenged Sevenfold) asking him if he wanted to come and be their lead guitarist. Brian joined up with them rather than continuing his education and becoming a studio musician.

Gates joined Avenged Sevenfold (A7X) when he was 18, at the end of 1999, right before the recording of the band's first album, Sounding the Seventh Trumpet. He was featured on their EP, "Warmness on the Soul," and on the reissue of their first album. He also plays piano for the band on songs such as "The Beast and the Harlot" and "Sidewinder”.

Gates cites Django Reinhardt, Adam Aparicio, Dimebag Darrell, Slash, John Petrucci and Francis Canavan as his favorite guitarists and major influences. He has won numerous awards, including the "Young Shredder" award of the year in the Metal Hammer awards in 2006 and the "Guitarist of the Year" Award for Total Guitar Magazine in 2006.