Starship Entertainment's #GUN, also known as Song Gunhee, is officially debuting with "BEEP."

"BEEP" was released on July 29 and is his debut single as a solo artist. The song is produced by Giriboy and features rapper Crucial Star.

DOMCAKE, Invidious, and Lee Taedon collaborated the produce the music video, which contains unique visual effects.

#GUN previously participated in rap survival show "Show Me the Money 5."

He is also known for being one of the trainees featured in the program "NO.MERCY," which debuted boy group MONSTA X.