There are at least nineteen bands called C4:
These are photos from concerts where C4 played, so they may be of other bands that played the concert as well.
Triple B / Daze / Streets of Hate Showcase 2023 - Day 1 Sep 30, 2023 New York, New York, United States Uploaded by Chris Sousa
Sound and Fury 2023 Jul 29 - 30, 2023 Los Angeles, California, United States Uploaded by Felix Joel Garcia
Sound & Fury 2023 Jul 29, 2023 Los Angeles, California, United States Uploaded by Felix Joel Garcia
Sound & Fury 2023 Jul 29, 2023 Los Angeles, California, United States Uploaded by Evan Sodman
No Pressure / Sunami / Pain of Truth / Restraining Order / C4 Jun 26, 2023 Karlsruhe, Baden-Württemberg, Germany Uploaded by Le Roy Ewart
Outbreak Fest 2023 Jun 23 - 25, 2023 Manchester, England, United Kingdom Uploaded by Vasco Lindeza
Jera On Air 2023 Jun 22 - 24, 2023 Ysselsteyn, Limburg, Netherlands Uploaded by Quintenquist
JOA 2023 Line-Up
Big Takeover Vol. 1 May 21, 2022 Richmond, Virginia, United States Uploaded by Ratty Rats
Restraining Order / Stand Still / C4 / Dead Last / Off The Tracks / Almighty Watching / Warehouse Mar 20, 2022 Massapequa, New York, United States Uploaded by Chris Sousa
FYA FEST 2022 Jan 8 - 9, 2022 Tampa, Florida, United States Uploaded by Evan Sodman